Poland is an Eastern European country on the Baltic Sea, known for its medieval architecture and Jewish heritage. In the city of Krakow, the 14th-century Wawel Castle rises above the medieval old town, where the Cloth Hall, a Renaissance trading post, is located on Rynek Glówny (Market Square). Nearby is the Auschwitz-Birkenau concentration camp memorial and the vast Wieliczka Salt Mines, with underground halls and tunnels.