This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

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

Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered cave.

Neo-cave art on the macro scale.

Prehistoric history as seen through the lens of an outsider artist.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

This statue in Plaza San Francisco commemorates a beloved figure from 1950s Havana.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

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

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

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

Giant, friendly pelicans in Central London, the most unlikely of places.

The bronze uniforms commemorate the vital role of women during World War II.

Eighty million natural history specimens call this gargantuan museum home.

One part local history, 99 parts gruesome haunted house.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.