The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

It's believed Elvis Presley was inspired to write his breakthrough track after staying here.

Dedicated to the victims of one of the deadliest hurricanes to strike the United States in recorded history.

A quiet spot commemorating two naturalists who had to choose between love and the university at which they both taught.

This monument claims to display the first pot used to cook a famed Southern stew.

These cabins mark the site where our 11th president was born (probably).

This general store is stocked with memorabilia from the 1930s onward—almost none of it for sale.

This park celebrates a sister city relationship that survived the Cold War.

The site of Martin Luther King Jr.'s arrest as he attempted to have lunch.

The final resting place of the Hunkpapa Lakota leader Tatanka Iyotaka, commonly known by the English translation Sitting Bull.

Though illegal, city officials have made an exception for this work of art.

Equipment used to mine silver and lead has been preserved in this almost-ghost town in northern Nye County.

In 1952, this restaurant began selling the Colonel's “secret” recipe.

This mural changes every few years.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

Every winter, this tiny islet on Florida’s Gulf Coast is swarmed by some of the largest birds on the continent.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.

One of America's largest retail chains got its start in one of its most remote rural destinations.

A series of life-sized statues of each governor of the state of South Dakota.

Under the right conditions, rocks will move across this dry lakebed, leaving trails behind them.

Built around 1723, this is the oldest surviving home in the U.S.'s oldest colonial city.

Where Kevin Eastman and Peter Laird created their "heroes in a half shell" and founded Mirage Studios.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.