A probable cave skylight on the Moon

A probable cave skylight on the Moon
A probable cave skylight on the Moon This dark hole, 65 meters in diameter, may be a window onto a subsurface cavern on the Moon. It was photographed by the Kaguya Terrain Camera on May 20, 2008, in a photo of the Marius Hills region of the lunar nearside. ISAS / JAXA / Junichi Haruyama et al.