Waterfalls

Nature's water park in the Wadi Bani Awf valley is full of pools flanked with cliffs and natural water slides.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

This large midwestern cavern features impressive rock formations and an underground waterfall.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

The most powerful waterfall in all of Europe.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.