Devil's Den is a karst window, in which the roof over a subterranean river has collapsed, exposing the water to the open surface, near Williston, Florida. It is privately owned, and operated as a SCUBA diving training and recreational facility. The water in the underground river is a constant 72 °F (22 °C) degrees. In cold weather water vapor rising from the s...

Catalina Island’s naturally clean and clear waters, abundant marine life, giant kelp forests, and diver-friendly services have made the island one of the top dive destinations in the world. In fact, a recent issue of Rodale’s Scuba Diving magazine ranked Catalina Island the #1 Dive Destination in North America in the annual Reader’s Choice Awards of ...

USS Oriskany (CV/CVA-34) – nicknamed Mighty O, The O-boat, and Toasted O was deliberately sunk off the Florida coast near Pensacola in 2004, and now functions as the world’s largest artificial reef. She was one of 24 Essex-class aircraft carriers completed during or shortly after World War II for the United States Navy. The Times of London named the Oriska...

Few sharks can rival the beauty and classic shark "form" of the Galapagos Shark. Getting it's name from it's original discovery in waters off of the Galapagos Islands. Although they have been implicated in attacks on swimmers, like many sharks, these sharks are not normally dangerous to humans. The Galapagos shark is a species of requiem shark, family Carcharhinidae, ...

Snorkeling and scuba diving on the offshore reefs are popular activities in Biscayne National Park in Florida.The park offers great SCUBA diving, including one of the only wall dives in the Florida Keys. The park's concessioner offers dive trips on Saturday and Sunday mornings. The park shares a common border with a well-known marine reserve to the south, John Penneka...

Dean's Blue Hole is the world's deepest known blue hole with seawater. It plunges 202 metres (663 ft) in a bay west of Clarence Town on Long Island, Bahamas. The full depth of the cave was reached by Jim King in 1992. In April 2010, William Trubridge broke a free-diving world record in the blue hole reaching a depth of 92 metres (302 ft) without the use of fins (Const...

Donsol is a area in the province of Sorsogon, Philippines. Donsol is a popular tourist destination for whale shark viewing which can be seen in its bordering seas. Swimming with whale sharks was featured as the Best Animal Encounter in Asia by Time Magazine in 2004. Whale sharks can be seen between November and June, with presence peaking between February and May. The...

Marovo Lagoon is the largest saltwater lagoon in the world. It is located in the New Georgia Islands, north of Vangunu Island. There are many islands in the lagoon, some of which are inhabited. The people live mainly by subsistence agriculture and fishing and speak the Marovo language. The lagoon is a popular destination for diving. The New Georgia Islands are part of...

The scuttling of the German fleet took place at the Royal Navy's base at Scapa Flow, in Scotland, after the end of the First World War. The High Seas Fleet had been interned there under the terms of the Armistice whilst negotiations took place over the fate of the ships. Fearing that all of the ships would be seized and divided amongst the allied powers, the German co...

The Bunaken National Park is a marine park in the north of Sulawesi island, Indonesia. The park is located near the centre of the Coral Triangle, providing habitat to 390 species of coral as well as many fish, mollusc, reptile and marine mammal species. The Park is representative of Indonesian tropical water ecosystems, consisting of seagrass plain, coral reef, and co...

Bikini Atoll is an atoll, listed as a World Heritage Site, in the Micronesian Islands of the Pacific Ocean, part of Republic of the Marshall Islands. Within Bikini Atoll, Bikini Island is the northeastern most and largest islet, measuring 4 kilometres (2.5 mi) long. As part of the Pacific Proving Grounds it was the site of more than 20 nuclear weapons tests between 19...

The most intact wreck in Australia, the Yongala sits in that diving haven: the Great Barrier Reef. The passenger ship sank off Cape Bowling Green, Queensland, Australia on 23 March 1911. En route from Melbourne to Cairns she steamed into a cyclone and sank south of Townsville. Traces of the ship were found days later as cargo and pieces of wreckage washed ashore at th...

The Chinhoyi Caves are a group of caves near the town of Chinhoyi in Zimbabwe. They are situated about 8 km north of Chinhoyi itself, and 128 km north-west of the capital of Zimbabwe, Harare. The caves are named after a local chief who used them as a refuge from Ndebele raiders. The cave system is composed of limestone and dolomite, and the descent to the main cave wi...

The Dahlak Archipelago is an island group located in the Red Sea near Massawa, Eritrea. It consists of two large and 124 small islands. It is the Red Sea's largest archipelago of which just four islands are inhabited; ruins from the early arabic/islamic settlers of the 8th century have been found and Ethiopian weapons and vehicles dumped into the sea during the war ha...

Blackjack was a B17 Flying Fortress lost in Milne Bay Papua New Guinea when it ran ot of fuel returning from a bombing mission. All the crew got out after the pilot landed the aircraft on the sea, they were cared for by local villagers. The still intact flying fortress that now lies about 45 meters deep and the sandy sea bed just off the coast. Divers can inspect the...