A visit is currently only possible:  for fully vaccinated people; for people who are proven to have recovered from Covid-19; or with a current negative test (antigen rapid test max. 24 h old, PCR test max. 48 h old). Children who have not yet completed the sixth year of life or are not yet enrolled in school as well as pupils of a primary school, a special educational and counselling centre, a school that builds on the primary school or a vocational school are considered to be tested.
You do not need to register in advance. However you can also book tickets online in advance via the Reservix booking portal.