Water

A toxic lake near a volcanic caldera that is home to flamingos and other life.

Site of the largest volcanic eruption in the last 25 million years, one which may have nearly wiped out humanity altogether.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The glowing blue Nymphaeum of Emperor Tiberius.

The largest tidal whirlpool in the Western Hemisphere.

A river with some unusual, and occasionally dangerous, habits.

Rusting ships sit in a desert where a sea used to be.

New fungal and bacterial species call this deadly lake home.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The ghostly remains of an accidental sea.

Direct, creative challenge to Mother Nature's winter wrath.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.

A stunning silver lining to global warming's gloomy cloud.

The ruins of Japan’s premier water brothel.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

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