History and geology blend at Dunmore Cave to give an interesting and unique situation. Consisting of a series of chambers formed over millions of years, the cave contains some of the finest calcite formations found in any Irish cave. The cave has been known to man for many centuries and is first mentioned in the 9th-century Irish Triads. Also onsite is an interactive virtual museum consisting of the several treasures found in the Cave including one of the most significant Viking finds in the country. As this site is managed by the OPW, school tour visits are permitted free of charge provided certain conditions are met.