Tma Semily is a family-run facility of the Bokotej couple in Nedvězí near Slaná, not far from Semily in the foothills of the Giant Mountains. In the garden next to their house there are two separate windowless cabins: a smaller one for individuals and a larger one for couples. Both have a bathroom with a shower and flush toilet, infrared heating panels, heat-recovery ventilation and air conditioning, which can also be operated in the dark.
Once a day the hosts bring a home-made vegetarian or vegan soup and main course; fruit and muesli are always available. Guests choose the level of guidance themselves, from food delivery only to conversation, breathing exercises or meditation, and can change it during the stay. Nobody locks the guest in; switching off the light and handing over the mobile phone are voluntary. The facility also caters for stays for two, including a parent with a small child; a sauna can be used before the stay.
Individual 2026, 15 or more nights: 1,500 CZK/night
Couple, 3 nights: 3,100 CZK/night
Couple, 4–6 nights: 2,980 CZK/night
Couple, 7–14 nights: 2,700 CZK/night
Couple, 15 or more nights: 2,500 CZK/night
Sauna before the stay: 700 CZK
Price includes
Accommodation in the cabin and all utilities
Meals once a day (soup and main course), fruit and muesli
Guidance as desired
Loan of musical instruments
Breakfast on leaving the darkness
Transport and sauna (700 CZK) are not included
Meals
included, vegetarian/vegan, once a day
Home-made vegetarian or vegan, gluten-free on request
Soup and main course are brought once a day between 11 am and 3 pm, each time at a different hour
Fruit and muesli are always available
Guests may bring their own food
Length of stay
from 3 nights, 7 recommended
The price list for individuals starts at 3 nights
Recommended length: 7 nights
Deposit and payment
30% (couples 50%) on booking
The booking is confirmed by a booking fee: individuals 30%, couples 50% of the price
The website does not state the payment method or when the balance is due
Cancellation
Cancellation a month or more in advance: 100% of the deposit is refunded
Three weeks in advance: 75% of the deposit is refunded
Two weeks in advance: 25% of the deposit is refunded
Less than 7 days in advance: the deposit is forfeited
Rescheduling by agreement with timely notice; transfer to a substitute free of charge
Early departure: nothing is refunded, not even a pro rata part
Health restrictions
Stay only for adults with full legal capacity
Excluded with mental illness (the website names claustrophobia, schizophrenia, manic depression); after a past illness a doctor's certificate is required
Excluded with an illness or medication that prevents the stay
Narcotic and psychotropic substances are prohibited before, during and immediately after the stay
Other conditions
Early departure: the stay can be ended at any time; neither the money nor a pro rata part is refunded.
Smoking in the cabin, alcohol, drugs, damaging equipment or violence end the stay without compensation
The guest signs the terms of the stay
Entry into the darkness usually around 6 pm, departure at daybreak with breakfast
Couple stays and stays for a parent with a child are possible (the website recommends children aged 3 and over)
Nobody locks the guest in; they may hand over their mobile phone
Guide
Guided by Anna and Andrej Bokotej, who live on site
They bring food daily between 11 am and 3 pm and can spend up to an hour with the guest at that time
On request: conversation, listening, breathing exercises or meditation, help in a crisis
The level of guidance is chosen when booking and can be changed during the stay
Information taken from the operator's website tma-semily.cz, last checked 25. 9. 2026. Prices and conditions may change; please confirm them with the operator before booking.. Texts are translated from Czech.
Getting to Tma Semily:
Location: isolated location Parking: 0 km Train: 2 km Bus: 2 km
Tma Semily on the map:
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Tma SemilyLocation: isolated locationParking: 0 kmTrain: 2 kmBus: 2 kmPrice: 2,700 Kč/nightprice per couple (2 people) per night incl. meals, 7–14 nights; the For Two page states 2,400 CZK
How to book Tma Semily
Book directly with the operator: website tma-semily.cz, phone +420 777 258 953, e-mail info@tma-semily.cz.
If they are fully booked, you can use these free dates at Léčba tmou near Kutná Hora. These are not dates of Tma Semily, but of the centre in Lomec near Kutná Hora (Czechia):