Plzeň historical underground, the tunnels beneath the old town

Beneath Plzeň's old town is a maze of cellars, corridors and wells dug over the centuries to store beer and provisions and for water. Part of it is visited with a guide: narrow passages, stairs and cellars at a cool temperature all year. It is run by the same company as the Pilsner Urquell brewery, and booked on the same website.