Kutna Hora is an old mining town with impressive Gothic monuments that has been declared a Unesco World Heritage Site. However, the ossarium in the suburb of Sedlec beats all these attractions. The All Saints cemetery church has the remains of over 50,000 victims of the plague, Hussite wars and the Thirty Years' War. The impression is amazing as the entire interior of the Skull Chapel is made of the bones and skulls of the dead.