For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An Old West film set seen in countless TV shows and movies is open for the public to explore.

Colorful Native American paintings are hidden within this small cavern.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

A giant cement churn carries the legacy of American resilience, unity, and greed.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

This house is a mosaic of tiled artwork sourced from local artists.

The only surviving fragment of the lost Narragansett Pier Casino.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This cheese shop also houses a museum devoted to Dutch dairy.

The beautiful behemoth is one of the largest trees of its kind in the United States.

From horses to stainless-steel trucks, this iconic Providence burger wagon is one of the oldest mobile diners in the country.