An ancient Egyptian temple in the middle of Madrid, Spain.

Commonly acknowledged as the only public monument to the Devil himself.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

This 18-foot-tall steel lotus is a meditation on ecological crisis that originally appeared at Burning Man.

This sign designates the road that leads to the infamous Area 51.

Mysterious meeting place for UFO hunters near Area 51.

Queen of the waterlilies, so big and strong it can support the weight of a human.

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

A beautiful opera house in the heart of Amazonia has recently restarted performances after a 90-year hiatus.

This striking, two-toned confluence of rivers is visible from space.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's narrowest alley is barely over two feet wide.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Sweden's oldest animated sign is still lighting up the skyline today.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The internet as provided by a James Bond villain.

Stockholm's deepest subway station is also a stunning ecological wonder.

Back in the day everyone who was anyone played this historic western theater.

Established in 1853, this crumbling cemetery sits forgotten on the corner of Church and Chapel in Gold Country.

One woman's Viking Castle on Lake Tahoe.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A second generation sun-powered marvel lights up the night.