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

Denmark’s never-ending bridge.

One of the world's largest collections of rare medical texts and ephemera.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

A war-torn Olympic relic is being overtaken by graffiti and nature.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

A tiny, remote island packed with wonders both natural and geeky.

Last stop before the top of the highest peak in the world.

A rare venue to buy specialty maps.

Huge stone depressions which may have acted as an Incan agricultural experiment.

A galaxy of glowworms—larvae of a gnat—hides deep in the belly of these caves.

Museum dedicated to the sacred leaf of the Andes.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

Mysterious Incan ruins on a tiny island in Lake Titicaca.

Astronomical observatory above Lake Titicaca.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The soaring gondola lines form the longest aerial cable car system in the world.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.