Bermuda is a group of 181 islands in the North Atlantic and offers several unique geological features. The Bermuda Triangle is an area with unexplained ship and plane disappearances, but its existence is subject to scientific skepticism. The island is also known for its extensive network of submerged caves, some of which are accessible to divers. Crystal Caves, a pair of limestone caves filled with crystal-clear underground pools, stalactites, and stalagmites that have formed over thousands of years, is a popular tourist attraction. The Bermuda Pedestal, a large, flat-topped plateau that rises about 3,000 meters above the surrounding seafloor, is thought to have formed during the Mesozoic Era. Finally, Bermuda's pink-sand beaches are created by tiny red organisms called foraminifera that live in the coral reefs surrounding the islands. These geological and geographic features make Bermuda a unique destination for both tourists and scientists.