NR-1 Sinkhole NR-1 Sinkhole The NR-1 Sinkhole is a giant underwater sinkhole located in the Straits of Florida southwest of Key West, Florida. It is found at an approximate depth of of water at the foot of the Pourtales Escarpment, an area of Quaternary sediment. It was discovered in October 1994 during a survey conducted by the American submarine NR-1, a U.S. Navy nuclear research submarine, and is named for the submarine. It was first identified via side-scan sonar and near-bottom echo sounder data, prompting a second survey in May 1995 to confirm the finding. Discovery of the NR-1 Sinkhole prompted scientific
Akhayat sinkhole But a part of the ladder has been demolished and descending by using the ladder is dangerous. There are several man made caves on the walls of the sinkhole. west of the sinkhole there are traces of an ancient settlement which was probably a cult center. It is thought that the sinkhole and the settlement were probably related to each other. There are rock tombs and altars to the south of the sinkhole There are other sinkholes in Mersin Province such as Cennet and Cehennem system and Kanlıdivane. Akhayat is relatively less known. Although it is possible to visit the