Podziemia Rynku w Krakowie

Beneath the Main Market Square lies a museum of over 6,000 square metres, much of it an archaeological reserve. Glass walkways lead over the remains of medieval structures under the Cloth Hall. A multimedia show using holograms and fog recreates the Kraków of seven centuries ago, and the displays include a 693 kg medieval lump of lead known as the loaf, along with coins, tools, weapons and everyday objects.