The Mariana Islands are part of a great submerged mountain range that extends all the way from Guam north to Japan. While the southern Marianas are known worldwide as tourist destinations, the uninhabited northernmost islands are actually a long string of active volcanoes fed by the subduction of the Pacific Plate into the Mariana Trench, the deepest location on Earth.
The term “blue hole” is given to sinkholes filled with water where the entrance is below the surface; but they are perhaps more accurately described as “vertical caves”. These caves were formed through normal erosion until the end of the…
Friday, 15th April 2011
Previously on Google Sightseeing