Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

The palace of the King of Kings, burned by Alexander the Great.

The youngest volcano in Central America.

Remote Honduran Islands with a colorful history.

A massive underwater sinkhole made famous by Jacques Cousteau.

The world's second largest single-dish radio telescope, once used to contact E.T.

Nature took her revenge on the "Wickedest City in the World."

World's largest cave was only discovered in 1991, and now offers tours to the public.

Light still pours into the ruins of this ancient Islamic observatory.

A fiery crater has been burning in the Karakum Desert since 1971.

Once a prosperous mining village, this tiny Taiwanese town is now overrun with cute cats.

According to Hindu belief, this shallow island chain was created by a god with an army of monkeys.

Seoul amusement park boasts a Korean-speaking pachyderm.

The world's first cruise ship-shaped hotel is perched atop a cliff.

Numerical symbolism abound at East Asia's oldest observatory.

Secret North Korean passage discovered below the world's most dangerous border.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

Terrapins of all colors and shapes are quick to bring fascination (and possibly long life) at this museum.

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

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

Enormous statue of the Emperor of the Mongols.

Fine dining 20 feet below the surface in the Indian Ocean.

An underwater restaurant, surrounded by a coral reef.

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.