Kostnice Bone Church in Sedlec
Kostnice, or "The Bone Church" as it has come to be known, contains about 40,000 human bones arranged to form various decorations within the church. The bones, belonging mostly to victims of the 14th century plague and 15th century Hussite Wars, were uncovered from mass graves on the church's site as the area was being developed. Local monks came up with the idea of putting the bones to use in the way you see them displayed today. This church is fascinating and certainly a "must-do" day trip from Prague!