Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

An open-air museum of 18th-century homes and churches transported from various villages in Southern Poland.

Boats must transform into railroad cars to navigate this Polish canal.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

A gigantic collection of teeny, tiny books.

The oldest housing complex in Riga is a mini timeline of architectural trends.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

This well held a sacred source of water supposedly unleashed from the barren rocks by a wizard-like archbishop.

An Inca spa, military outpost or maybe… both?

These overlooked ruins give an intimate look at the Inca Empire's urban planning prowess.

These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

The world's largest clay lick, where parrots gather to snack.

Ain't no party like a ghost town party.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.