Greatest Hits – Joel Sartore
A Holiday Romance – With A Whale
Beautiful photos – National Geographic

These stunning shots show the beautiful and eerie underwater world of a Swiss ice-filled Alpine lake.

Taken in Lake Sassolo, close to the southern border with Italy, these were taken by diving photographer Franco Banfi.

Although the high altitude region is known for its sunny weather, the lake was formed by the run-off of the Alps surrounding it.

The giant ice structures dwarf the tiny divers as they explore the nooks and crannies of the icebergs.

The Cave of Swallows, also called Cave of the Swallows (Spanish: Sotano de las Golondrinas), is a pit cave situated in San Luis Potosi, Mexico. The entrance lies along a sloped section of karst, is elliptical in shape, and measures approximately 160 by 205 feet (49 by 62 m). The entrance is undercut around its entire perimeter, and the pit opens up to a room that measures approximately 995 by 440 feet (303 by 134 m). The low point of the entrance provides a 1094 feet (333 m) freefall drop to the bottom of the cave while the high point provides a 1220 feet (372 m) freefall drop. These measures make it the largest cave shaft in the world, second deepest pit in Mexico and the 11th deepest in the world.

Lake Louise is a lake in Alberta, Canada. The glacial lake is located in Banff National Park, 5 km (3 mi) from the hamlet of Lake Louise and the Trans-Canada Highway.