Exploring the Longest Underwater Cave in Russia. Ordinskaya or the Orda Cave is the longest underwater cave in Russia. Accoridng to the Orda Cave Awareness Project it is the first and only underwater gypsum excursion cave in the world.
There are adventures everywhere in Iceland. Icecave in Solheimajokull glacier is an amazing thing. This is my beautiful country. If you ever want to see amazing nature then visit Iceland. -saedis Photo by Orvar Atli
Texas is blessed with some of the nations most interesting "show" caves and thousands of "wild" caves throughout the state. Because of the varying geographical regions and features of Texas, you could literally tour the entire state by jumping from cave
A pair of divers explore the wreck of the Giannis D (originally Shoyo Maru) on the Abu Nuhas reef, Strait of Gubal, Red Sea, Egypt. By British photographer Alex Mustard. He's travelled the world snapping pictures of wrecked ships lying on the sea bed.
The Marble Caves is geological formation of unusual beauty. These caves have formed in a pure marble and are bathed in the deep blue water of General Carrera Lake. Chile, the Marble Caves are some of the most impressive attractions of Patagonia.
Fingal’s Cave, Inner Hebrides, Scotland. "Fingal's Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides of Scotland, part of a National Nature Reserve owned by the National Trust for Scotland" via Wikipedia.
Cave diving,only those who are properly trained and properly equipped should ever enter a cave system underwater. If you are an Open Water Diver, equipped for that sport, you have no business in a cave.