Private sauna back to the source

    Feel like relaxing for a while? Book our special private sauna Back to the source, where a part of our public thermal baths was transformed into a temporary private sauna.


    • The Saltstone Sauna
    • The Eucalyptus Sauna
    • A relaxation bath
    • A heated foot bath
    • An indoor relaxation area with heated loungers
    • Part of the park
    • Half of the large pool
    • Hot and cold showers
    • Sanitary facilities

    Interested? Call 02 759 81 96 to make your reservation right now or book it easily online via this link.

    Please note: the two private saunas Back to the Source and Back to the Garden are partly shared: the swimming pool areas are only separated by a rope and the park is available to customers of both private saunas. Mutual contact is strictly forbidden and the current corona measures (social distancing) must be followed. The other facilities are separate and may not be used interchangeably.


    Two persons: 155 euros/2 hours, 310 euros/4 hours

    Three people: 189 euros/2 hours, 344 euros/4 hours

    Four people: 219 euros/2 hours, 374 euros/4 hours

    Promo! Book before May 16 our private sauna for 4 hours and you’ll receive 30 minutes extra for free!

    Please note that these packages are not for sale as gift vouchers, offer valid until 16/05/2021, cannot be combined with other actions, promotions, multi-access cards and/or discounts. Bookings for Back to wellness, Back to nature, Back to relax, Back to the castle, Back to the garden and Back to the source from 01/05/2021 onwards are subject to change. If the public baths are allowed to open again, we will contact you to adjust the reservation.

    Please note: you can rent the private sauna on Friday, Saturday and Sunday between 9 am and 10 pm and every day during the Easter holiday (from April 2 to April 18). For those who start their session between 9:00 and 9:30 am, we have something extra in store for you: a free breakfast!

    Want to surprise someone? Give them a Thermae Boetfort gift voucher

    You choose the gift voucher amount which the recipient is free to spend as they wish at both Thermae Boetfort and Thermae Grimbergen. You can put together your day of wellness to your own liking. Gift vouchers are always valid for six months.

    You can fully personalise your gift voucher with a message for the recipient and a layout with your chosen design.

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