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 - October
Start: 2025-10-07
End: 2025-10-11
Location: The Synthesis Institute
Rating: 5

5.0018 reviews

Sparjeburd 2, 8409 CK Hemrik, Netherlands

Up to 20 in group

October 7 - 11, 2025

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

Costanza

Juan

Bernardino

Mary

Costanza Di Prisco

Role: Lead Facilitator. Costanza began working with psychedelics in 2012, initially as a participant, later as an assistant, then began training with shamans and healers, and eventually studied to become a Psychedelic Practitioner. Her last few years have been devoted to psilocybin, though she has worked with a variety of plant medicines. She is also a breathwork coach, working with the body's knowledge to achieve understanding and promote healing. She has trained in Bioneuroemotion, a field that blends biology, neuroscience, epigenetics, NLP, and psychology. She received training in India to be able to instruct in meditation, yoga, and pranayama. She has finished a master plant dieta with Noya Rao and follows the tradition of the Shipibo from Peru in terms of shamanic techniques. Her facilitation style combines ancient wisdom methods with cognitive therapeutic techniques from the West to produce powerful transformational experiences. When singing in ceremony, Costanza places emphasis on the healing potential of music. Her goal is to serve as a bridge for people seeking to start or continue their own journeys of self-discovery; creating safe spaces so others can engage in their psychedelic healing experiences feeling supported and empowered so their own inner wisdom can emerge.

Juan Tepui

Role: Retreat Facilitator. Juan has studied music since childhood and music production at University. He became interested in psychedelics and their strong influence on music and consciousness from an early age. He has spent years in India practicing meditation and yoga in various ashrams. He studied the Bansuri flute with the legendary Pandit Hariprasad Chaurasia, and now teaches and makes Bansuri himself. He has been dedicated to facilitating live music for meditation, healing, and psychedelic ceremonies for many years, for the Ayahuasca tradition of Colombian Shamans and increasingly for psilocybin journeys. Juan is passionate about the transformative power of psychedelics, what they can bring to humanity, and how they can help us heal our connection to nature and spiritual growth.

Bernardino Machado

Bernardino is a Religion Sociologist and Physiotherapist (specialised in manual therapy and myofascial disorders), born in Venezuela but currently living in Madrid, Spain. He has been studying yoga, meditation and ancient traditions for more than 20 years. In the last ten years he has worked as a yoga Alliance certifier delivering 200-TTC and workshops all around the world. Having a passionate interest for the use of psychedelics in ancient cultures and religion practices, he is very interested in exploring the effects of psychedelics combined with ancient eastern practices as yoga and Qigong as a way of expanding human consciousness and finding inner balance . Having music background as guitarist and flute player, he enjoys playing music from different traditions in the context psychedelic ceremonies.

Mary Bredin

Mary is a psychotherapist with over 30 years experience of working in a variety of UK healthcare settings as a clinical supervisor, group facilitator, researcher, and educator. She specializes in helping people face loss and change, illness, and death, and is particularly interested in how nature connection, mindfulness, self-compassion, and vision quest rites of passage can support journeys of personal growth, transformation, and healing. In her spare time, she tends an old Cornish garden, which has lots of flowers and brambles. She swims in the sea all year round and loves to walk in wild places.

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. Read More

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

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

Directions

You can reach the Retreat Center easily by taking a train from any part of the country to Heerenveen, and then taking a taxi to New Eden. Alternatively, you can also use taxi services such as Uber, Bolt, and private taxi companies that operate in the country. Read More

Accommodation

Immersion Retreat Read More

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

Nestled within 50 acres of serene Dutch countryside just 90 minutes from Amsterdam, New Eden has been a wellness sanctuary for nearly 30 years.

Here, you’ll feel like family, surrounded by pristine nature and beautiful, serene accommodations. At New Eden, you will find the perfect blend of European charm, warmth, and comfort, creating a space where deep personal work feels natural and effortless. Read More

Meals

Menu Types

Vegan

Vegetarian

Pescetarian

Ayurvedic

Includes Meat

Organic

Gluten Free

Dairy Free

Nut Free

Our menus are created to be wholesome, balanced, and aligned with the needs of your experience. If you have dietary preferences or restrictions, we’re here to accommodate you with care. Read More

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

Liz • May 05, 2025

5.0

Verified

Five Stars: well supported

The surrounding jungle, wildlife and waterfalls were powerful support for me throughout the week. Our facilitators were mindful, gifted with wisdom and music so personal that the experience felt orchestrated for my best interest. I experienced an intentional layering of preparation that felt like being surrounded by goodness. The food was outstanding. The accommodations a bit rustic but clean and very close to nature. I hope I can return to this space in my mind for the rest of my life. Read More

Mitchell • Apr 14, 2025

5.0

Verified

'Exceptional' does not adequately describe my experience

From my first interaction over Zoom, Synthesis gave me much more than I ever expected.

This is a 6-week retreat. The Integrative Zoom sessions before and after the 5-day in-person experience are important and powerful. I did not expect that this entire retreat was so deeply inclined towards meditation and a spiritual journey. There was much power and transformation that occurred even outside the 2 'Ceremonies'.

As well, the facilitators gave care and respect for my personal journey. Helping me, but always allowing me to find my own path. If you are undecided if the Medicine is right for you, I very much recommend that you reach out and have a discussion with Synthesis.

Come with an open mind and leave with an expanded Heart :) Read More

Patricia • Dec 19, 2024

5.0

Verified

Immersion Apprenticeship Retreat

This summer, I had the privilege of attending the immersion retreat from Synthesis in the Netherlands as an apprentice. It was a profoundly beautiful and insightful experience that provided invaluable lessons for my future practice as a psychedelic practitioner. The facilitators were experienced and very kind, creating a safe and supportive environment throughout the retreat. The food was also outstanding. I wholeheartedly recommend this immersion retreat. Read More

Daniel • Dec 18, 2024

5.0

Verified

Amazing experience, people and team!

As a complete novice to entheogens/psychedelics it was amazing to see how the retreat catered to those of all levels, helping a rookie like me feel very safe & secure while still keeping those with more experience really engaged! They do a great job of curating groups of awesome people, while our group was very diverse there was no drama or issues. Read More

Wilderness • Dec 17, 2024

5.0

Verified

Fantastic!!!

I attended the Synthesis Immersion Retreat as both a student and a participant. The facilitators were top notch in every way: highly experienced in indigenous and western medicine traditions, live music as well as playlists, breath work, compassionate caretakers, deeply present to each of us. Their teaching was clear and relevant. I learned so much about facilitating medicine journeys, and I also dived deep into my own journeys.
In addition, the location is gorgeous. My only complaint is that the tents were so hot during the day (nights were fine), even though they were air conditioned, that you really couldn't hang out in there. But no problem because there are lots of beautiful spaces to hang out by yourself or with others. The waterfalls are fantastic, and fun getaways from the "work."
Food was amazing, and the chefs were so friendly and always committed to meeting any special dietary needs.
I highly recommend this retreat. Read More

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

Retreat Highlights

About this Retreat

Your Guides

Costanza Di Prisco

Juan Tepui

Bernardino Machado

Mary Bredin

Details of this retreat

Schedule

Getting Here

Directions

Accommodation

Venue & Amenities

Meals

Menu Types

What's Included

What's Not Included

Five Stars: well supported

'Exceptional' does not adequately describe my experience

Immersion Apprenticeship Retreat

Amazing experience, people and team!

Fantastic!!!

Have a question for your host?

Similar retreats