Enormous burial mounds of ancient emperors.

Standing in this historic plaza is a statue representing one of Cuba's most iconic literary characters.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

There are eight natural springs around town, each with a slightly different taste.

Abandoned silver mine strewn with wrecked and twisted structures.

This spectacular track has run continuously since 1882.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

A lush oasis full of vibrant plants and striking geometric displays.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

An often overlooked ancient site in downtown Athens with substantial history (and nature).

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

This is the oldest Roman-made bridge in the city still existing in its original state.

Rome’s legendary peephole vista is also a former Crusader stronghold.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This clifftop arch is a natural stunner.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Erotic art covers the walls of the largest ancient pleasure palace.

The walls and streets of the ancient city are peppered with penises.

Ancient snack bar of the Roman Empire re-opened.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.