Pompeii's less famous neighbor is still revealing her secrets.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The final resting place of the poets Shelley and Keats.

Stalactites and stalagmites in a beautifully lit cave.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

2300-year-old Roman road connecting the empire.

The oldest operating pharmacy in the world features 800-year-old recipes.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The middle finger of modernity.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The yawning maw of this pagan visage is said to bite off the hands of liars.

An alchemist's "magic door" stands in the middle of a Roman park.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A 16th-century horror show built in a lovely Italian garden.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

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

A bronze sculpture of Lenin’s likeness outside Havana surrounded by 12 human figures in solidarity with the Bolshevik Revolution.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

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

A Spanish-style estate that has traded black ties for rock concerts.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.