Crystal lagoons, WWII shipwrecks, and underground rivers await in the Philippines' pristine ecological frontier. Here's your complete guide.

A tropical island with soft sands and warm seas is an ideal honeymoon destination. Here are some of the best, most romantic ...

The twin caverns, El Pakiva and Tecopa, showcase some of California’s most unusual cave decorations. Marvel at the “cave ...

You won't believe the atrocities commited within this tiny cave that ended up creating one of the most haunted places in Arizona.

The caves stay cool when the desert outside is blazing hot. Underground chambers hold rock formations that took eons to create. Stone icicles hang from cave ceilings in frozen waterfalls. The desert ...

News World news Natural wonders Cave dubbed 'world's most breathtaking secret' could kill you within minutes The Cave of the Crystals is one of the most stunning geological wonders at the centre ...

Stunning cave at 'centre of Earth' will kill you within minutes The Cave of Crystals has been described as one of the seven geological wonders on the planet - but tourists are banned because of ...

Here in Kentucky, the excitement of an underground adventure doesn't have to end after the bus at Mammoth Cave National Park drops tourists back off at the visitors center. Here are five caves to ...

Mammoth Cave National Park is Kentucky's only national park, but it isn't the state's only cave open to the public.

The world beneath our feet is teeming with life, hosting extraordinary creatures that have evolved to thrive in perpetual darkness. Unlike occasional burrowers that venture to the surface, some ...

The park held its first ever underground pool party, with guests getting on floats and drifting through water in Cave Branch Cave. The cave was decorated with LED lighting with music playing.