For all tours the number of guests is limited to 20 guests.
For the individual tours pre-booking is mandatory. For the tour with our audioguide you do not need to book upfront. Please do not forget your mouth-nose-mask and a "2-G-Certificate" (vaccined, recovered).
You can pay via Paypal. For payments via direct debit ("Lastschrift") or credit card ("Kreditkarte") you do not need a paypal account. Please note that payment via direct debit does not work if you own a paypal account due to paypalʻs security restrictions.