A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

An eerie collection of the surviving structures from a past celebration of the future.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The final resting place of the great navigator, or maybe his brother.

Spain's largest bullring offers a unique glimpse at architecture and history.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This nearly abandoned town was once a thriving mining community until a series of fires.

A remarkably well-preserved brick chimney from a smelter dating to the 1860s is all that remains of this former mill.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

Come for the speed, leave in love with the desert.

How a bat poo mine became a major Native American archaeological site—and connections to legendary red-haired giants.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

The world's largest wooden structure.

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

A statue commemorating the heroic life of a Viking postman who was the Godfather of California skiing.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A breathtaking 19th-century trail overlooks Lake Tahoe.

The museum is housed inside the historic 1863 Carson City Mint.

An eccentric millionaire's personal curio collection includes at least one shrunken head.

This beloved roadside attraction welcomes visitors with his signature neon smile.

This former New Jersey bus now exists as a public art exhibit.

The only surviving prototype of Buckminster Fuller's revolutionary car.

An iconic 1960s theater with a Buckminster Fuller-style geodesic dome.