A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Metro station with a claim to rock n' roll fame.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

This landmark cemetery in Boston was created more than 300 years ago.

Largest lake in Great Britain measured by surface area.

The modern birthplace of Irish freedom.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

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

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A man-made island in scenic San Francisco Bay.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

There must be a pun in this haystack somewhere...

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

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

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

This private residence was the template for one of the most beloved television homes of all time.

Dramatic river bend surrounds a natural red-rocked pedestal.

The world-record holder for the longest bridge stretching continuously over water.