An architectural oddity hides in plain sight on this iconic London bridge.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

The lead horse on a Disneyland merry-go-round that is older than the park itself.

Allegedly haunted by Walt Disney himself, this inconspicuous lamp is always kept lit in his honor.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

A prestigious learning institute of old Shanghai.

An ancient fortification lives on in this Chinese city.

Although resembling a grand Buddhist temple, this structure is actually the largest mosque in China.

China's most famous acrobatics act.

The once highest point in China blends symbolic design with a kick of adrenaline.

These tiny statues form a terracotta army from China's Han dynasty.

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

A man-made island in scenic San Francisco Bay.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

San Francisco's newly reopened hands-on science museum.

San Francisco's first World's Fair, dedicated to the wonders of California.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

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

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Where the first "expert riders, willing to risk death daily" for the Pony Express were recruited.