Booking is essential. Tours are in Polish but you can download the audio-guide to your phone (corded headphones are provided). The tour starts in the museum, then proceeds underground.
Hours
09:00-16:00 (10:00-16:00 on Tuesdays), closed Mondays
Guide text adapted from the Wikivoyage article "Ostrowiec Świętokrzyski" by its contributors, available under CC BY-SA 4.0. Read on Wikivoyage · Contributors · CC BY-SA 4.0
