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

With Costanza Di Prisco, Juan Tepui, Bernardino Machado and Mary Bredin

October 7 - 11, 2025

Location: New Eden Retreat Centre, Nertherlands

Address: Sparjeburd 2, 8409 CK Hemrik, Netherlands

Contact: immersion@synthesisretreat.com

  • $5,797.00 – Immersion 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.

About the Leaders

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 […]

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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, […]

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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 […]

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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 […]

Learn more about Mary Bredin

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