The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A museum founded to reflect on and remember the human rights abuses under Chilean dictator Augusto Pinochet.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

A 125-meter long "tribute to the Brazilian people."

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

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

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Museum devoted to the artificial language of Esperanto.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Handsomely crafted representations of our round planet.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

Eighty million natural history specimens call this gargantuan museum home.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

It is against the law to obstruct the view from the top of this English burial mound.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.