A bright turquoise river cascades beautifully down stepped terraces in southern China.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

A massive concentration of algae is responsible for this lake's pink hue.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

A magically clear, blue river that seems to spring from nowhere.

Hidden deep within a Filipino jungle is an incredible waterfall that plunges into a dazzling blue-green pool.

Three wildly colorful calderas top this otherworldly volcano chain.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

An explosion of natural color known as "the river that ran away from paradise."

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Inhospitable caverns just beneath this island paradise offer insights into alien worlds.

The subtle interplay of fire and water is hard to ignore at this remote Jamaican spring.

One of the deepest blue holes in the world.

Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

An unnatural lake in a naturally beautiful setting.

The world's brightest bioluminescent bay.

This crack in France's seaside cliffs once hid a sinister secret.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.