Andros Blue Holes

Andros is the largest island of the Bahamas. At its eastern coast is a belt of deep water, called the tongue of the Ocean. Along this stretch belt shoals and coral reefs, and with them spread out the dark depths. These are the inputs to some of the most amazing underwater caves and corridors in the world.


Flowing water quite easily washes away the limestone rock, carving caves and tunnels. Layers of limestone on the islands of The Bahamas is known the world thickest layers of this mineral. They form under the water layer with a thickness of 8 km. On the coral reefs are formed and while the limestone sinks (on average 1 cm per 100 years), weight increased very coral. It is known thatsome of them are located at a depth of more than 3050 m, and their length exceeds 2300 m.

Residents Bahamas blue hole called churning, or blowing holes, due to the rapid movements of water that flows out of the cavesor affect them. When the flow increases, the holes leading to the formation of dangerous caves, strong eddies. When the watersubsides, the dome umbrella holes spit out water. Exploring caves can be very dangerous. The water flow is so strong that divers can reach them only lasting 20 minutes during a quiet period called the dead waters. Several people have drowned here, whenthey ended up oxygen.