The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

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

This pristine World War II airfield gives a comprehensive look at atomic development and aviation history.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A house carved into a rock in the 1940s.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

This environmental engineering marvel keeps salt water from the Elizabeth River.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

Constructed by the younger brother of George Washington.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

This "castle" is actually a limestone and quartz formation hidden along a trail.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

Anna Anderson spent most of her life claiming to be the lost Romanov child Anastasia.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.