Cameron's Staff Pick

Immersion: Synthesis’ 5-Day Legal Psilocybin Retreat in the Netherlands

Name: Immersion: Synthesis’ 5-Day Legal Psilocybin Retreat in the Netherlands - 6-10 April 2027
Start: 2027-04-06
End: 2027-04-10
Location: The Synthesis Institute
Rating: 5

5.0036 reviews

Sparjeburd 2, 8409 CK Hemrik, Netherlands

Up to 20 in group

April 6 - 10, 2027

Retreat Highlights

Two guided psilocybin ceremonies in a safe, legal setting
Intimate group sizes (about 20-25 people total)
Breathwork embodiment practices for deeper processing
Live music and sound healing facilitation during ceremony for intentional emotional release and connection
In-depth preparation, integration, and 1:1 support throughout your journey
Trauma-informed care from our highly experienced Synthesis facilitators, who have guided more than 1,100 participants since 2018

About this Retreat

Your Guides

Hanneke

Lesley

Dr.

Hanneke Schots

Hanneke holds a safe space for individuals to explore their inner world with honesty, courage, and compassion. A psychodynamic therapist specialized in trauma and inner child work, she weaves body-based practices, breathwork, hypnotherapy, shadow work, voice dialogue, and psychedelic-assisted approaches to support meaningful transformation. With a vibrant practice in Amsterdam and extensive experience facilitating retreats and trainings internationally, Hanneke is known for creating attuned, non-judgmental spaces where people can meet themselves more fully. She brings a grounded presence, a trauma-informed perspective, and a deep commitment to guiding participants toward clarity, wholeness, and inner coherence.

Lesley Quilty

Lesley has four decades of experience as a group facilitator and coach, and in working with altered states as a vehicle for transforming consciousness. She aspires to bring authenticity, courage, tenderness, and joy to all she does. Lesley embodies a long-term immersion in a number of intersecting healing modalities. Respectful use of psychedelics and plant medicines in ceremonial settings, Buddhist Insight meditation, the Indigenous Red Road practices of Sundance and Sweatlodge, Conscious Connected Breathwork, Family and Organisational Constellations, Archetypal Psychology, 20 years as a leadership consultant and trainer, and 40 years living in an international intentional community have all been part of her path. She is also a professional red-nose clown and clown-doctor. Her work with Synthesis began in 2021, as a Learning Facilitator and Guest Faculty on the Professional Psychedelic Facilitator training, and ultimately as a Lead Facilitator on the retreat team. Everything she shares as a facilitator is rooted in her own committed personal practice and ongoing study.

Dr. Lela Mosemghvdlishvili

Dr. L. (Lela) Mosemghvdlishvili (they/she) is a contemplative educator and facilitator with two decades of experience at the intersection of inner work, academic inquiry, and embodied practices. Their training integrates many ways of knowing. They currently divide their time between teaching at the University of Amsterdam and supporting psychedelic facilitation and training. Lela’s path with entheogenic (psychedelic) medicines began in 2004 through personal work during a period of grief. This grew into underground psilocybin facilitation from 2010 to 2017, supporting individuals and small groups. Alongside this, they apprenticed in ayahuasca facilitation with Shipibo healers and learned to carry Kambo medicine in the Matses tradition. Lela also co-founded and served on the board of the Amsterdam Psychedelic Research Association (2017–2022), contributing to the destigmatization of research, education, and public dialogue around psychedelics. Since 2023, Lela has been part of the Synthesis Institute as faculty and a learning facilitator, later also joining the immersion retreats. Outside the psychedelic facilitation field, Lela works at the University of Amsterdam as a lecturer and teacher trainer, committed to humanizing education and bringing more embodied and contemplative learning methods into university teaching. A significant part of Lela’s life is devoted to the study and practice of Anuyoga and Ati Yoga in the Tibetan Buddhist tradition. She is a translator for Lama Lena Yeshe Kaytub, bringing non-dual teachings into her mother tongue, Georgian. Lela is also an authorized Feeding Your Demons® facilitator. Across these different domains, the most essential for Lela is a non-judgmental, open presence that supports individuals in recognizing their innate nature.

Details of this retreat

What if you could connect with the deepest parts of yourself, discover new insights, and step into a life of greater clarity, connection, and purpose?

At Synthesis, we warmly invite you to join Immersion—a comprehensive 7-week program that includes pre-retreat preparation, a 5-day psychedelic-supported retreat in the serene landscapes of the Netherlands, and post-retreat integration.

Designed for those who are eager to gain clarity and direction on their path forward, tune in to their deepest wisdom and truth, and unlock a greater sense of purpose and meaning in their life, we offer a safe space to intentionally explore the power of psilocybin truffles to catalyze lasting personal change and embody your most authentic self.

Since 2018, we’ve supported over 1,100 individuals through safe and legal psychedelic retreats. Using our integrative approach to transformative wellness, we combine leading-edge research with ancient wisdom traditions, rituals, and spiritual practices to curate a potent container that has the potential to catalyze lasting change and wellness.

“I did not really know what to expect, but what I received was beyond my wildest dreams. It was an exquisitely beautiful, profound experience. I am going to say: the most profound, exquisitely curated experience of my life."

– Corina

Past participants have shared that our retreats have helped them:

- Reconnect with their authentic self and inner wisdom
- Heal emotional wounds and release what no longer serves them
- Find clarity and connection in a supportive, nurturing environment
- Navigate life transitions and a renewed sense of purpose

If this resonates, then this retreat will be an exceptional opportunity for you to join us in communitas, no matter where you currently are in your process.

Disclaimer: Synthesis is owned by Retreat Guru.

Schedule

Day 1: Your retreat begins the day you arrive at the venue. We will start with a welcome circle, followed by one-on-one facilitation meetings where you will clarify your intentions and confirm the dose for your first psilocybin mushrooms (or truffles) experience. The evening culminates in a group sound meditation experience.

Day 2: After morning practice and detailed instructions, you will participate in your first psychedelic ceremony using psilocybin mushrooms (or truffles). You will be fully prepared and made comfortable in a setting optimized for your needs, allowing you to make the most of your psychedelic experience.

Day 3: You will spend time integrating your first psychedelic experience while simultaneously preparing for your next one. The schedule includes group practices, integration workshops, and one-on-one meetings with an experienced facilitator.

Day 4: After morning practice and a guided workshop, you will experience your second psychedelic ceremony.

Day 5: The retreat’s final day centers on integration. You will participate in one-on-one and group integration sessions to begin processing your experience which will help support and enable you to integrate it more fully into your life.

Note: Schedule is approximate and may change

Getting Here

The Synthesis Institute, Sparjeburd 2, 8409 CK Hemrik, Netherlands

Directions

From San Jose Airport, a taxi 3 hours to the Retreat Center. From Uvita Airport, a 1h30min taxi drive.

Accommodation

Immersion Retreat

Venue & Amenities

A/C in Rooms

Free Wifi

Spa

Sauna

Pool

Towels

Free Parking

Kitchen

Tour Assistance

Hot Tub

Coffee/Tea

Cafe

Restaurant

Fitness Center

Yoga Studio

Housekeeping

Bicycles For Rent

HOLOS is a retreat center nestled in the sacred Diamante Valley in Costa Rica. This emerald haven is a magical landscape of cascading waterfalls, lush jungle, and mountain peaks. Holos Retreat Center has a stunning bamboo air shala, a ceremony space that breathes with the rhythm of nature. Chefs provide nutrient-rich foods, much from their own lush vegetable garden. Relish the experience of being immersed in nature, with the open-sided shala, luxury glamping accommodation and outdoor showers.

Meals

Menu Types

Vegan

Vegetarian

Pescetarian

Ayurvedic

Includes Meat

Organic

Gluten Free

Dairy Free

Nut Free

Organic vegetarian menu. We serve for allergies and dietary restrictions

What's Included

Three 75-minute pre-retreat preparation sessions to set intentions and prepare
Five days at the peaceful New Eden retreat center in the Netherlands
Two guided psilocybin healing ceremonies with psilocybin truffles
Two transformative breathwork sessions to deepen your journey
Daily voicework and embodiment practices for connection and grounding
Live music to support and create your experience
Sharing circles and one-on-one integration support for reflection and growth
Three post-retreat integration sessions, including somatic and social integration tools to set intentions and remain connected moving forward
Personalized guidance from experienced, trauma-informed Synthesis facilitators

What's Not Included

Airfare
Travel

Customer Reviews

5.00 out of 5.0 average rating

Richard • Sep 21, 2026

5.0

Verified

Compassion and Professionalism

Lesley was one of the senior facilitators and my one-on-one counselor at the Synthesis Immersion Retreat.

I found her to be insightful, compassionate and a consummate professional. She has a very warm, soothing presence that immediately puts everyone around her at ease, but she can also be firm when necessary. She also has a great sense of humor! I thought she did a really amazing job of creating and nurturing the container of radical inclusion and acceptance necessary to make this collective journey something really unique and life changing.

Her one-on-one sessions during the retreat were also extremely helpful in identifying issues that need more focus in my life. She always asked the right questions!

If you have an opportunity to do a retreat with Lesley, I would highly recommend it. She really knows how to help you get the most out of this experience and is just an amazing human being!

Richard • Aug 30, 2026

5.0

Verified

Life Changing Experience

Every detail of this retreat was so well thought out. The facilitators were all amazing, the retreat center was beautiful and located in a pristine Dutch countryside, the vegetarian food was incredibly tasty, complex and satisfying (thanks Tara!), and the environment of radical inclusion and acceptance fostered by the team provided the perfect setting for deep exploration (and new lifelong friendships).

I was a bit skeptical going into the retreat about how comfortable it would be to journey in front of all of the other "strangers" participating in the retreat. However, after the three preparatory Zoom calls preceding the retreat, I felt as if I knew the other participants before we arrived in New Eden. The bond with them then became close very quickly thanks to the environment of radical inclusion and acceptance fostered by the team. By the time of the first journey, I was actually excited about the prospect of journeying together with these lovely people.

During the journeys, the facilitators seemed to have an innate sense of when and how to offer assistance or comfort. Hanneke's carefully curated music playlists were the perfect accompaniment. When the journey was over, the team was there with fresh fruit, snacks and coconut water. I really cannot imagine a more perfect set and setting for psychedelic exploration.

While the insights gleaned from the retreat will be different for everyone, this experience has left me with a much greater sense of gratitude for life's gifts and a greater ability to accept those things that are beyond my control. It has been life changing for me. I really cannot recommend it highly enough.

Daniel • Aug 09, 2026

5.0

Verified

World class and wonderful.

After significant research I settled on Synthesis to deliver a retreat in this complex, sensitive area. The team were impeccable and demonstrated world-class knowledge and experience. The schedule was thoughtfully put together and kept me engaged but not exhausted. The veggie/vegan food was wonderful. I found there was plenty of time for getting to know other retreat attendees but didn't get much personal/private time simply because our group was so lovely and sociable. I think in a quieter/less cohesive group I'd have got through at least one of the three books I took but it was not to be on this occasion and I'm very glad of that. Beautiful location. Excellent!

Richard • Aug 07, 2026

5.0

Verified

Life changing

Absolutely beautiful and amazing. The facilitators and team were wonderful, the group became so connected and full of love, and I was genuinely transformed by the program focused around the two trips. At many moments it was completely transcendent, beyond words - I am so grateful. Please go!
PS the food was also delicious and the setting idyllic!

Eléonore • Aug 06, 2026

5.0

Verified

Extraordinary retreat

I'm not sure I'll find words that can convey how transformative this retreat was. I'm full of gratitude for the week we spent at new Eden, and the deep humanity and wisdom of the team, their unfailing support and the skillful way they brought us on this journey and made us all a 'familia'.
The effects will ripple through me for a very long time, which is a blessing. I'm taking this with me.

A word of advice; if you, dear reader are considering this retreat, you must make sure you are ready. It is not for the faint of heart. It requires moral courage. This is not 'woowoo' or fluffy or sparkly unicorns. Show up authentically and you will be rewarded a thousand-fold.

Immersion: Synthesis’ 5-Day Legal Psilocybin Retreat in the Netherlands

Retreat Highlights

About this Retreat

Your Guides

Hanneke Schots

Lesley Quilty

Dr. Lela Mosemghvdlishvili

Details of this retreat

Schedule

Getting Here

Directions

Accommodation

Venue & Amenities

Meals

Menu Types

What's Included

What's Not Included

Compassion and Professionalism

Life Changing Experience

World class and wonderful.

Life changing

Extraordinary retreat

Have a question for your host?

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