Grotta di Matromania
The Grotta di Matromania (or Mitromania or Matrimonio) is a large, natural cave on the east coast of the island of Capri, Italy. It is located near the Arco Naturale. The cave is approximately 27 m long, 18 m wide, and 18 m high. It is connected with Mithras.
- Royal Geographical Society (Great Britain). (1903). The Geographical journal (Public domain ed.). Royal Geographical Society. pp. 133–. Retrieved 5 July 2012.