This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

At high tide, the base of the lighthouse covers practically every inch of the island.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

The remains of a monument in the remote Kazakhstani desert dedicated to the only men to die in outer space, the crew of the Soyuz 11 rocket.

The largest stone moai on Rapa Nui.

Enormous lake at the bottom of a unique cave system.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

This lost city belongs to one of the earliest civilizations in the world.

The ghostly remains of an accidental sea.

A toxic ghost town sitting atop a massive coal fire.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

Northern Ireland's Brobdingnagian stepping stones.