This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A bit of retro transportation flair preserved in the world's largest department store.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Museum dedicated to the terror regimes of Hungary.

Macabre astrological automaton clock dating to the late 1400s.

Guns that have been defending San Francisco since 1904.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Eighty million natural history specimens call this gargantuan museum home.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Pilgrimage site for star-crossed lovers.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

Siddhartha Gautama sat here and received enlightenment.

A blooming house of worship for the masses.

Once an indicator of social class, the color blue has come to define this city on the edge of the Thar Desert.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most famous location in China was home to whole dynasties worth of imperial rulers.

One of only two commuter aerial tramways in the United States.

A crumbling hospital from the 1850s on Roosevelt Island.