Devil's Cave (Tropfsteinhöhle)
On this half-hour tour through a 2½-million-year-old cave on the outskirts of Steinau, you may stumble upon sleeping bats as you explore the unique geological formations, including stalactites and stalagmites that reach up to 82 feet (25 meters) high and 36 feet (11 meters) in circumference as well as a so-called chapel room with ceilings up to 26 feet (8 meters) tall.
