This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

A small obelisk commemorates the launch site of the world's first liquid-fueled rocket.

This New England drive-in was built to straddle the border between two states.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This marker identifies the location where three states converge.

This small piece of Michigan is entirely surrounded by Ohio.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

This unusual three-way wooden foot bridge spans two rivers at once.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

Pizza joint known for labor-inducing salad dressing.

Sip a cappuccino in the historic cafe that introduced them to the United States.

America's oldest Italian restaurant is a San Francisco institution.

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

This monument pays tribute to the city’s contribution to basketball history.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

Family-run for more than a century, this pizzeria makes a unique mustard pie.

This small-town pizzeria won the Hollywood lottery.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.