15 March 2011
DERWEZE - DOOR TO HELL The Derweze area is rich in natural gas. While drilling in 1971, geologists tapped into a cavern filled with natural gas. The ground beneath the drilling rig collapsed, leaving
DRAIN HOLE Google Maps: http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=lake+berryessa,+ca&sll=37.0625,-95.677068&sspn=58.946508,87.978516&ie=UTF8&hq=&hnear=Lake+Berryessa&ll=38.511975,-1
DEAN'S BLUE HOLE Dean's Blue Hole is the world's deepest known blue hole with seawater. It plunges 202 metres in a bay west of Clarence Town on Long Island, Bahamas. YOUTUBE: http://www.youtube.com/
Direct link:
http://dayviews.com/prettyantique/2011/3/15/