South Africa - Kimberley Mine

What a BIG hole!

South Africa - Kimberley Mine

GPS: -28.739300, 24.758481
You can put the coordinates in google maps to see the localization

Photo taken by Irene2005, Creative Commons

WikipediA: http://en.wikipedia.org/wiki/Big_Hole

Mexico - Ik Kil Cenote

Who wants to dive?

Mexico - Ik Kil Cenote

GPS: 20.661620, -88.549613
You can put the coordinates in google maps to see the localization

Photo credits to cutetastic

WikipediA: http://en.wikipedia.org/wiki/Ik_Kil

Samoa - To Sua Ocean Trench, Lotofaga

Want to swim in here?

Samoa - To Sua Ocean Trench, Lotofaga

GPS: -14.043860, -171.562273
You can put the coordinates in google maps to see the localization

Photo taken by Mick Byrne - May 2012

More info about this place: http://www.samoa.travel/sightseeing/x40/To-Sua-Ocean-Trench

Oman - Bimah sinkhole, Bimmah

An Oasis in the desert!

Oman - Bimah sinkhole, Bimmah

GPS: 23.035843, 59.071988
You can put the coordinates in google maps to see the localization

Photo taken by naturalbornstupid, Flickr user - October 2008

More info: http://www.dailymail.co.uk/news/article-2145344/The-worlds-beautiful-sinkhole-Cavernous-20m-deep-limestone-bowl-attracts-tourists-swimmers-Oman.html