Blue Hole (Big Pine Key)
The Blue Hole is an attraction on the island of Big Pine Key in the Florida Keys. It is an abandoned rock quarry that was used for nearby road fills and Henry Flagler's Overseas Railroad. The water it contains is mostly fresh and is used by various wildlife in the area, such as birds, snakes, alligators, key deer and green iguanas. It is part of the National Key Deer Refuge.
Black Hole (roller coaster)
Black Hole was an enclosed steel roller coaster at Alton Towers in Staffordshire, England. It operated from 1984 until 2005. The coaster was located within a huge black tent (formerly green and yellow) that ensured the ride took place in total darkness. The coaster itself was a Jet Star II, designed by Anton Schwarzkopf. During the time that the ride operated, the park also operated a similar outdoor Jet Star III coaster, the Beast.