Hidden Holes are recurring locations in the Legend of Zelda series. They consist of a small hole leading to an underground cave or room. A shaft of light shines down through the hole; when Link steps into it, he will be transported back to the surface. Hidden Holes can be found in the open or under boulders, and sometimes require bombs, the Megaton Hammer, or ocarina songs in order to be revealed. Hidden Holes are also occasionally found in areas with tall grass; their locations can be approximated by spotting the tell-tale butterflies that flutter around their entrances. Hidden Holes can be found almost everywhere in Hyrule, Termina, and on many islands of the Great Sea. While inside a Hidden Hole, Link's location on the minimap is not shown.