A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

The first of Lancaster's "rural cemeteries."

Where the oil industry began.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This dramatic rail curve was once the target of a failed Nazi attack.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

A local prank turned town icon.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This elaborate towering structure was once famed for its revolutionary height.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A toxic ghost town sitting atop a massive coal fire.

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.