Four metres beneath Kraków's Main Market Square — the largest medieval square in Europe — lies a second city. Rynek Underground is a vast, atmospheric museum built directly over the excavated streets, foundations and trade routes of the medieval market, reached through the Cloth Hall that still stands at the square's heart.
Opened in 2010, its permanent exhibition, "In the Footsteps of Kraków's European Identity," is not rows of objects behind glass. You walk on glass floors above the real excavations while holograms, projections and reconstructed merchant stalls conjure the market as it stood seven hundred years ago — the burned settlements beneath, the aqueducts, the weights and coins of a great trading city on the routes between east and west.
It is one of Kraków's most popular museums, and it is timed-entry with daily caps — which is exactly where a concierge earns its place. We hold the slot you want, tell you how to find the entrance in the Cloth Hall, and make sure a sold-out afternoon on the operator's site doesn't quietly cost you the visit.