The Mariana Trench is the deepest part of the Earth's surface in the western Pacific Ocean with 10.98 km depth. Its deepest point is called the Challenger Deep ...

In 2001 a team led by Ukrainian Yuri Kasjan set a world record in the cave of 1,710 ... Probing a series of “windows” in the walls of the deepest part of the cave, the team was blocked time ...

Take Veryovkina Cave—the world’s deepest known cave hidden in the Arabika Massif of the Western Caucasus. Stretching 2,212 meters (7,257 feet) into the abyss, it is a vertical gateway to a ...

The deepest part of the infamous Mariana Trench - a 43-mile-wide crescent canyon that cuts its way through 1,500 miles of ocean at the edge of two tectonic plates - the Challenger Deep is home to ...