The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

Unique tower has outlasted a takeover of the company.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

Moonbows over Kentucky.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Walk the whole Mississippi River!

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

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

This Buddhist temple is home to a number of towering statues spread over a peaceful wooded park.

Electrical pylon in the shape of Disney's beloved mouse.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

This abandoned bridge is now a favorite haunt for graffiti artists.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

The only Florida state park with publicly accessible caves.

This picturesque ghost town is located on the banks of the Suwannee River.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

This twisty sign depicts the chain's first logo.

A statue honoring 44 continuous years of greeting passing ships.