Blue caves as seen from a tourist speed boat. Limestone rock formations with visible cavities and caves dyed in fluorescent colour. Zakynthos island, Greece. Boat tour around island. Royalty-free ...

Visitors marvelled at the weathered limestone rocks hanging from the ceiling of South Africa's Sterkfontein caves, millions ...

A new tour of the famed Akiyoshido cave system here, one of the largest limestone networks in Japan, offers visitors the ...

There are few better antidotes to that hectic city life than a visit to an impressive natural rock formation. Without trekking too far out of Melbourne, you'll find a handful of captivating grottos to ...

With its limestone rock formations, turquoise waters ... Say hello to Sissu Waterfall Caves and Lagoon, a location that looks like it's been plucked straight from Krabi’s postcard views.

Firefighters often use water to put out a blaze, but in Augusta County a team of 11 men and women set a fire to ensure ...

Isotope analysis of limestone cave deposits indicates repeated humid periods in the Saharo-Arabian Desert over the past eight million years. The Saharo-Arabian Desert is one of the world’s largest ...