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

The remains of a ruined mansion memorialize the 1906 earthquake.

In this century-old literary safehouse, print is alive and well.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

An astounding collection of taxidermy, fossils, skeletons, and even a few strange live beasts.

A sharp bend in a dramatic river canyon cut through red rocks.

A little-known hot spring haven right below the highway.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

The fifth-longest natural arch in the world, and the longest outside China.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

The beams of the New College, Oxford dining hall come with an amazing story.

This 11th century tower is said to be the oldest building in Oxford.

Jesus' footprints and the first catacombs in the world.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Self-mummified monk who wears sunglasses and has become a gecko hatchery.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

Museum in a swimming pool where the water still flows.