Belize's Great Blue Hole is one of Earth's most mysterious features. Anyone peering into the 125 metre (410ft) deep pit will wonder what secrets and stories lie beneath. Now, scientists have ...

They often appear as a dark blue colour due to its depth, creating a distinct visual contrast against the surrounding water ...

Plunge into this deep blue hole and you'll discover imposing ancient stalactites (calcium deposits resembling icicles) and coral fringe. Declared a UNESCO World Heritage Site in 1996 – along ...