Psychedelic retreat


Reconnect with nature and your true self. Find a renewed sense of joy, meaning and creativity.

This retreat includes two workshops with meditation and breathwork practices, a profound psychedelic ceremony with immersive live music and ample space for inner exploration and reconnection with nature.

We take care of every detail, so you can comfortably turn your attention inwards.
We’re here to guide you all along the way. 



We will start one week prior to your psychedelic retreat with a preparation workshop. You will feel calm and ready for your psychedelic ceremony. We'll close off with a workshop providing practical tips on how to integrate your insights into your daily life.

stEP 1:

Our preparation workshop gives you all the knowledge and practical skills to confidently start your journey. You’ll learn how psychedelics work and we explain how to prepare your mind and body.

Step 2:

This is a profound psychedelic ceremony with truffles containing natural psilocybin. You'll be able to access deeper levels of consciousness where new insights can emerge and infinite possibilities can be explored.

SteP 3:

Our online integration workshop is meant to explore and reflect on the insights and challenges you may have encountered during your psychedelic experience.

Let's talk

booK a CaLL

We understand you may have many questions, which we’ll gladly answer. An intake call is free and without any further obligation. We’d be happy to speak with you.

Please also take a look at our FAQ below

COnnect TO YOUr own WISdom

Meet Your GuiDES

You will be guided throughout your process of personal growth with focused attention and personal care by our experienced guides.

jannEKE KRIJGsman


Janneke loves guiding people to reconnect to their most authentic self. For many years she has been teaching meditation, yoga and breathwork, while also exploring the fields of plant medicine. For the last couple of years she has specialized in working 1 on 1, assisting people to find more clarity in the various challenges of life. Continuously inspired by her own inner journey, Janneke naturally invites people to discover their inner world, with all its depth and beauty. She has been with Spinoza from day one and has been essential in creating the Spinoza Programs. Janneke brings a peaceful and loving presence as well as her voice and music to each Spinoza Ceremony. She loves beautiful conversations, early morning dips in the sea, and sharing homemade food with her loved ones. She lives in The Hague and is a dedicated mother to her son Maas and daughter Ief.



Maarten has been teaching meditation and assisting people to make the journey inward for over a decade. With silence, plants and fungi he guides people towards natural wisdom. Maarten has founded Delight Yoga, Wisdom in Business, Return to Sender and The Loft. These initiatives function as a network of organisations united around one sole purpose: inspiring a more natural and conscious way of living. Early in his career, he worked for some large companies which allowed him to think big in terms of organisation and communication. Leading several creative agencies taught him the power of storytelling. Spinoza forms the pinnacle of a personal journey with plant medicine starting in 1999 and has grown into an intelligent network of therapists and scientists united in the mission to experience and experiment with the health potential of natural medicine and nature therapy. Maarten is a proud father to Philip, Alexander and Victoria, and dedicated husband to Anna.



Marjolein has a background in conscious leadership and coaching in both personal and professional settings. Her experience in leadership and executive coaching combined with her warm, compassionate and empathetic approach has helped many people to find their purpose and essence in life. In recent years, she has rekindled her love and passion for music. Marjolein loves to use the healing power of frequency, melody and her voice to guide people through profound processes.
At Spinoza, she’s able to empower people by combining many of her personal interests; from spirituality to plant medicine, her own life experience and her love for music. Marjolein is a proud mother of Beer and is happily together with Edo.



Thomas has a background in psychology (licensed psychologist) and is currently training to become a psychotherapist. For over a decade he has been working with people with deeply embedded patterns and how to bring these unconscious patterns to peace.
Because of his formal psychology training and his work with plant medicine, he deeply understands the role of psychedelics in the process of growth, healing and transformation. This allows him to support others in their journeys and during altered states of consciousness, which he does with much care and presence.
Thomas is happily married to Katka and together they are enjoying their life near the beautiful nature and beaches of The Hague.

we ARE here TO EMpoweR YOU TO conNECT TO youR OWN WIsdom.


GROund for GRowth

Our psychedelic retreats provide solid ground for personal growth. It can shed light on aspects of your life or personality that may need more attention. You’ll also be able to shift your awareness from your head to your heart – from rational to intuitive decision making.

  • Diving below the surface of yourself to experience what is really important to you.

  • A psychedelic experience can help you to go beyond the individual self and get a sense of something much greater that we are a part of.

  • Recreational use can be fun, intentional use can help us to bring real change into our lives.

  • Moving beyond our conditioned mind and connect to our deeper intuitive intelligence.

  • Experience the power of the shift of perspective that a psychedelic experience can bring about.

WE ARE Here to guIDE YOU

Whether you have no experience at all and want to familiarize yourself with psychedelics in a safe and responsible way, or if you are looking for more profound and meaningful experiences, you are welcome with us. We offer a highly personalized approach, from preparation to integration. We’re here to guide you all along the way.



In our ceremonies, we offer our signature tea made from legal truffles containing natural psilocybin. This induces a psychedelic experience of approximately 4-6 hours.

Dosages are determined in consultation with each individual participant and based on your experience, intention and current physical and mental condition.

After ingestion, Psilocybin is metabolised by our bodies into Psilocin, which is responsible for inducing the psychedelic state. Its molecular structure fits precisely into one specific serotonin receptor (5HT2A).

What is serotonin?
Serotonin, like dopamine, is a neurotransmitter. It’s sometimes referred to as the “happiness” or “feel good” molecule. It practically controls all human behavioural processes and plays a dominant role in the Central Nervous System.

What is neuroplasticity?
Thoughts and habits create neurological pathways in the brain. When we repeat a particular habit or thought, this pathway gets ingrained in the mind. The longer, the deeper, sometimes even to the point that we think there’s no other option.

Neuroplasticity is the ability of the brain to form new connections. New connections can mean new insights, ideas and perspectives on an existing problem or observation.

A psychedelic experience can create a window of time where there is an opportunity to rearrange or reroute some of these pathways. This can enable you to replace habits and thought patterns that may no longer be beneficial to you.

FrequENTLY ASKED questioNS

  • Psychedelics improve the brain’s neuroplasticity, which can be helpful in breaking thought patterns and replacing old habits with more beneficial behaviour. It allows you to gently and calmly open up to thoughts and feelings that you may avoid in everyday life. You may feel a deeper connection with yourself, allowing you to address a wide range of issues in your life. Psychedelic journeying is most useful when supported by the program and practices we offer in our app.

  • Psychedelic plants and fungi have been used in indigenous medicinal traditions for thousands of years. The scientific world has studied the benefits of truffles since the 1950’s and has repeatedly reported positive effects on behavior, cognition, spirituality and consciousness. As scientific research continues, promising results are made in neuroscience, mood and mental disorders, addiction and habit formation.

  • There are two main considerations when taking psychedelics: your physical and mental health and the timing in your life. If you are receiving treatment or taking medication, please consult your doctor. As for timing, trust your intuition. Do you have enough time and space in your life? Are you in a balanced and open state of mind? The tools we offer, like our Psychedelic Masterclass, are designed to help you create the optimal conditions for mind and body.

  • Your experience and the longevity of its benefits will likely improve if you’re well prepared. Our Psychedelic Masterclass offers a variety of practices to create the right mindset and environment for a meaningful and safe journey. We will give you detailed practical information on dietary recommendations and help you find peace of mind through meditative practices and breathwork.

  • Psilocybin is 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. We advise you to conduct your own research as well and to consult various sources of information.

  • Fresh truffles containing natural psilocybin are legal to buy and consume in the Netherlands. Unfortunately, this is not the case in most countries around the world. However, you can still enjoy the benefits of our Transformation Box and educational platform even if your country has not yet legalised truffles containing natural psilocybin. Unfortunately, we can not ship our truffles, but we have an international option with a nice surprise.

  • In general this is a high dose ceremony. Meaning: 21 grams of fresh truffles. However, we will check in with you and can change the dosage accordingly.

  • Our Sclerotia Psilocybe are 100% natural, unprocessed and free of additives. Do not consume if you are under 25 years of age, pregnant or breastfeeding. Do not take in combination with alcohol, drugs or medication or while driving. Please consult your doctor beforehand if you have a mental and/or medical condition. Read more in our protocol above.

  • Do not consume psilocybin when you take any medication. Always consult a doctor before you take any further steps. If you have any specific questions, we can also consult our medical expert for this.
  • (PLEASE CONSULT A DOCTOR WHEN IN DOUBT) There are a few important contra-indications, such as if you are suffering from heart problems, if you are currently dealing with mental issues, or when you are pregnant.

    Please make sure that you carefully check our list of contra-indications below:

    – You have no current physical or mental health disorder;
    – You have no history of psychosis or close relative with a schizophrenic disorder;
    – You do not currently take any medication;
    – You are not currently pregnant or breastfeeding.