A tunnel with windows, so you don't miss out on the impressive views.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

For roadside fast food, pull over at the giant orange.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

The remains of Crystal Palace Great Exhibition of 1851.

One artist’s scheme to expand museum viewing hours into the evening led to the illumination of an entire city.

This grand memorial remembers the 20 members of the Los Angeles Times killed when the office was bombed.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.

The first KFC is on the National Register of Historic Places.

A late-night restaurant empire was launched from this humble storefront.

The first "Hut" was actually a small brick building.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

An unassuming secret door once led to a legendary watering hole.

An allegedly cursed tree represents a town's reckoning with a racist past.

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

Although he donated over 3,000 acres to Los Angles, Griffith's life was marred by controversy.