Legend says this sacred tree was a gift from goddess Athena.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Macabre astrological automaton clock dating to the late 1400s.

Theater has had many different incarnations but has survived the ravages of time.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Hans Christian Andersen for the postmodern world.

This chimerical bridge/tunnel appears to dead end right into the sea.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

The world's brightest bioluminescent bay.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

A three-centuries-old crypt in the foothills of an old plantation.

Inside this faux cave, visitors can learn how some of their favorite fantasy characters were created.

High winds can make this one scary landing.

A colorful street named for the legendary Australian rock band.

France's most famous cemetery, with some of its most curious tombs.

The final resting place of the "father of special effects."

Copenhagen's celebrated theme park and gardens.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

This demon atop the Notre-Dame de Paris looks utterly bored.

The vast, legendary catacombs hold secrets much stranger than stacked bones.