Elaborate tile work in this railway station tells the story of Portugal.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Pop culture has helped to keep this iconic British building from being destroyed.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Hidden beneath the streets of London is a secret subway that only carried mail.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The mountaintop inspiration for Umberto Eco's "The Name of the Rose."

See every month of the year personified at this opulent Turinese fountain.

Europe's simulation of the Martian surface uses soil from Mount Vesuvius.

A portrayal of two lamps embraced and in love.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

This Torino museum honors a soldier who kept the city safe using barrels of exploding gunpowder, losing his life in the process.