Tourist reveals how a diving holiday ended in tragedy when his friend failed to surface - and his ensuing horror at being accused by police of his murder

A new book documents the extraordinary story of how a Czech man's Croatian holiday turned into a nightmare when his friend ...
Morning Overview on MSN

World’s longest underwater cave system runs 524 km, dwarfing Grand Canyon

The world’s longest underwater cave system now stretches an astonishing 524 Kilometers, a hidden labyrinth that, in raw ...
IFLScience

The Longest Underwater Cave System In The World Is A Staggering 524 Kilometers – Longer Than The Grand Canyon

It dropped down to number two for a while, but more recent exploration confirms Mexico's Ox Bel Ha is officially the longest ...