This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.

A grand entrance to one of the world's smallest Chinatowns.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

CDMX's home for the world's culinary delights.

A Volkswagen Beetle decorated with millions of beads connects Mexico's past and future.

These subterranean models show Mexico City's central square during three different eras.

This monumental fountain has moved around the city multiple times.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This lush, scenic spot was carved by the turquoise waters of the Radovna.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A miniature train-ride through Slovenia's largest cave system.

An unmistakable facial pareidolia in the Julian Alps also includes a fantastic tale.

This one-time health resort was used by aristocrats around the world.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

You'll find just about anything in this funky Tbilisi flea market.

A museum glorifying the life of Stalin, located in the city of his birth.

Ancient rock-hewn town that witnessed key events of Georgian history.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

Unusual building appears to be haphazardly built from randomly piled bricks.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

With over 10,000 lights, this engineering marvel lights up the city after dark.