During this 4-day Autumn retreat, we offer you two guided psilocybin journeys and a special Cannabis Ceremony that gently and intuitively supports the integration of your insights. Autumn invites us to slow down, turn inward, and release what no longer serves us. It is a time to harvest what is of value and nourish the inner soil. A moment to give yourself space to slow down, deepen, and transform.
During this 4-day Autumn Retreat, we dedicate full attention to both mental and physical wellness.
On Thursday, October 23rd, we begin at 9:00 AM. You’ll get to know the group and be given space to settle in and feel at home. We start with essential information and a breathwork session to prepare you for the first psychedelic journey, which will be guided using a medium dose of psilocybin.
On Day 2, after breakfast, we reflect on the first journey and prepare you for the second. There will be an opportunity for a 1-on-1 session with one of our professional coaches. The second journey involves a higher dose of psilocybin, allowing you to explore more deeply now that you know what to expect and can focus more intentionally on specific inner themes.
On Day 3, after breakfast, we share reflections on both journeys. This day is all about integration. In the afternoon, we offer a Cannabis Integration Circle to gently support and enhance the insights you’ve gained. This circle provides a relaxed and intuitive way to deepen your integration.
On Day 4 (Sunday), we’ll gather one last time to share final reflections. You’ll be guided in bringing your insights together so you can return home with clarity and a renewed sense of direction for your personal growth. We’ll close around noon.
We choose to offer two journeys because, in our experience, this format offers the most valuable insights. The second journey often builds upon the first. With familiarity from the first experience, you’re able to go deeper, connect more easily to the subconscious, and explore more intentionally.
Throughout the retreat, you’ll share a room (a private room is available for an additional fee). You’ll have plenty of time to enjoy nature, relax in the sauna, and unwind. We provide delicious, healthy vegetarian meals.
This retreat is a true gift to yourself. The relaxation and insights gained from the two psilocybin journeys and the Cannabis Circle bring you into full connection with yourself. In that space, you can clearly see what you want for yourself and which possibilities you’re ready to embrace. You begin to step fully into your potential.
Before the retreat, we’ll schedule an intake call with each participant. Just before the retreat we organize an introduction group zoom call and two weeks after the retreat, we’ll host a group Zoom integration session.
Post-retreat support on request is included.
Autumn Retreat Oct 23-26
You're signing up for a 4-day retreat in Culemborg starting on Thursday 23 October 2025 and ends on Sunday 26 October 2025.
Price: € 1.950,-
This retreat in the middle of fall will be facilitated by Eric & Marieke.
They have designed this program to give you the peace and space to learn and get to know yourself better, surrounded by nature with comfort and use of wellness.
In the Netherlands, it is legal to purchase and consume psilocybin in the form of ‘magic truffles’. Truffles are a different part of the mushroom, known as sclerotia, which remain dormant and help the mushroom regrow after damage. Magic mushrooms, in contrast, are illegal.
Psilocybin is completely safe when used responsibly in a safe environment with people you know and trust. It is a naturally occurring substance that is converted by the body into psilocin, which acts on the serotonin receptors in the brain. Psilocybin is not addictive and there are no known reports of overdoses.
Psilocybin is not an addictive substance. You may enjoy and get a lot out of the experience, but you’re not likely to become physically dependent on psilocybin.
The age limit of 25 years is installed because the brain is still growing and developing up to that age. Important contra-indications as some disorders are found almost always before the age of 25 (but not always before 20). We must take this contra-indication very seriously because of the immense consequences when things go wrong. And as a young adolescent you rather not come in contact with a very high dose of psilocybin, like participants use in our Retreats.
If you are taking medication, consult your doctor before taking any further steps. Before you sign up for a retreat, please let us know what type of medication you are taking. We can also consult our medical expert to help you gain clarity.
What other people say
Therapy with myself
"It was as if I had a good conversation with my subconscious, actually a kind of therapy with myself"
Fanny
The Netherlands
Dealing with the purest form of all my emotions
"I opened the door to my inner self and spent some time in there, dealing with the purest form of all my emotions, answering my most pressing questions, and making peace with my world and self. Beyond that, I connected with the oneness that we're part of, taking a peek at the building blocks of the journey that we call life."
Cosmin
Germany
Connecting to my inner world
"This past weekend it was time for a journey with magic truffles. What a wonderful experience. I was able to quiet my mind (that alone was a relief) and to connect with my inner world and my own authenticity. I felt and saw a lot. For me a journey in a whole new dimension. Eric and Marieke thank you for sharing your fantastic place and for being there as a spaceholder!"
Ellen
The Netherlands
An overwhelming gratitude
"I arrived with an intention to connect. There was a sense of celebration, too, because my first real psychedelic experience felt like it would be a reward for all the personal development work I have done over the years. When I left that same evening, what I took with me was an appreciation of opposites; overwhelming gratitude for the loving connection to my wife and son; and a sense of my effortless brilliance, coupled with a deep understanding that, whoever I am, I exist only in relationship – it is solely through connection to the people who cross my path and walk alongside me that I am able to shine."
Jonathan
The Netherlands
Incredibly profound and mindblowing - Cannabis Retreat
For me, a psychedelic journey is incredibly profound and also mindblowing. Sometimes the journey is abstract, full of feelings an images who are not so clear to me and sometimes is overwhelming, beautiful full of love and a deep feeling in my body and mind. Afterwards the light always conquer the darker images and experiences, even the dark can be seen different. The cannabis journey gave me 2 journey's in one trip, a mindjourney and a different journey in my body. A profound physical experience like a never experienced before.
Astrid
The Netherlands
A wonderful journey through the unknown
A wonderful journey through the unknown. A beautiful start to discover more.
George
Nederland
A true gift to myself
"What a fantastic experience this was. A true gift to myself. Many thanks for a provoding such a caring and safe environment."
Petra
The Netherlands
Connecting to my inner self
"In a beautiful place, where I felt safe and comfortable, I got the opportunity to connect to my inner self in a very special journey. Throughout the journey and the aftermath I was be able to give attention to feelings and thoughts that in daily life I easily ignore. This experience created awareness of my soul and peacefulness within myself."
Hester
The Netherlands
It changed my life forever
"It was an intense but unforgettable day and night. I dare say it changed my life forever. In a loving and honest way, Marieke exposed my ingrained habits and beliefs and gave insights that I was not even aware of. The journey, the beautiful location, the delicious food and the beautiful conversations made a deep impression on me."
Paula
The Netherlands
I experienced heaven!
What a liberation, I experienced heaven!
You have made sure that you didn't miss anything. You cared for us with so much love and dedication. I felt at home and safe at all times. I couldn't have wished for a better place for my first psychedelic experience. I thank you from the bottom of my heart for these three days full of insights.
Alexandra
Switzerland
Reconnect with my emotions
"An exciting new endeavor that is nothing like anything I have done before. But which unfolds in a familiar journey through my innerself and where I could reconnect with my emotions in a warm, beautiful and calm setting, Where untrodden paths can suddenly be walked again is a wonderful gift."
Sanne
The Netherlands
Beautiful insights
"Many thanks for the wonderful day and beautiful insights. I wouldn't have missed for the world. I see it as just the beginning of the journey. We see each other again soon."
Heiko
The Netherlands
An experience I want to cherish
"Thank you for all the good care. A wonderful experience that I want to cherish for as long as possible."
Bauke
The Netherlands
Coming home
"Going to Eric and Marieke is always like coming home. Their hospitality is heartwarming and the location fantastic. The whole concept has a 'worry-free' effect. You can and may let go of everything for a while and focus entirely on yourself and your own process. You will be guided where necessary. The trips are sublimely accompanied by appropriate music and the necessary care. If you would like to take a big leap in personal development and do so in a very beautiful way, this is the place to be!"
Rob & Cindy
Belgium
An unforgettable experience
"It was an unforgettable experience and I look back on our discovery with gratitude. I'm sure there will be more 'loosening up'. I'm looking forward to that. The welcome, care and loving 'holding space' was really overwhelmingly beautiful. You do that incredibly well."
Sandra
The Netherlands
Wonderful experience
It was again a wonderful experience and so very loving!! Thank you Eric & Marieke
Leon
The Netherlands
Intensely beautiful experience
"We are in the after glow of enjoying an intensely beautiful experience. Thank you so much for your guidance on this beautiful day!"
Marjorie
The Netherlands
Unforgettable experience
"Thank you so much for our unforgettable experience."
Helena
The Netherlands
I wouldn’t want to experience my next psychedelic journey anywhere other than at ‘The Matter'
Eric and Marieke have made a dream come true with 'The Matter' — a place for anyone who wants to grow personally with the help of plant medicines.
The yurt, the music, the apartments, the food, the conversations with the coaches, the program, absolutely everything is just right. It creates a calm and safe environment where you can fully surrender and let go in complete trust — and grow from it. I wouldn’t want to experience my next psychedelic journey anywhere other than at ‘The Matter’.
Brigitte
The Netherlands
Our mission
“It is our mission to facilitate others so that they gain new insights, get closer to themselves and be able to see their own beautiful and unique qualities again. To be who they want to be.”
The place
Rest is one of our most important basic needs. We do everything we can to create a soothing experience that makes you happy, fulfilled and energized. Calm your mind in our beautiful place and find the clarity and silence to find your true self.
Ceremony
We make a psychedelic journey together.
Fire Pit
The warm place where we get together and let go.
Yurt
Our magical yurt forms the sucure foundation.
Discover our other events
We are convinced that everyone has the power to reach their highest potential. Driven by a deep respect for the nature around us, we help people become the best version of themselves by continuing to discover themselves. Turn potential into matter.
Voed jezelf in 3 dagen met
gedachten die er toe doen.
Download hier het gratis e-boek.
That's the way the cookie crumbles
We use non-psychedelic cookies to provide content and functionalities of this website, such as videos, and to collect statistics. In addition, we can use advertising cookies for promotional purposes on, for example, social media. By clicking accept, you consent to advertising cookies.
