Bimmah Sinkhole Bimmah Sinkhole Bimmah Sinkhole (Arabic هـويـة نـجـم "Hawaiyat Najm") is a water-filled depression, structurally a sinkhole, in the limestone of eastern Muscat Governorate in the Sultanate of Oman. A lake of turquoise waters, it is 50 m by 70 m wide and approximately 20 m deep. It is only about 600 m away from the sea, between the coastal towns of Ḑibāb and Bimmah. The sinkhole was formed by a collapse of the surface layer due to dissolution of the underlying limestone. However, locals believe that it was created by a meteorite, ‘Hawaiyat Najm’, which translates to ‘The Falling Star’
Devil's Sinkhole State Natural Area Devil's Sinkhole State Natural Area Devil's Sinkhole State Natural Area is a natural bat habitat near the city of Rocksprings in Edwards County in the U.S. state of Texas. Home to the Mexican free-tailed bat, access to the area is available only through advanced reservations. The Devil's Sinkhole is a vertical natural bat habitat. The opening drops down to reveal a cavern some below. The cavern was first discovered by local residents in 1876. H. S. Barber carved his name inside the cave in 1889. The area was transferred to the state of Texas in 1985, and open to the