The lasting remains of the region's once booming cement industry.

Once home to a booming 19th-century oil town, the park now houses a World War II submarine memorial complete with a torpedo.

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

The failure of one component toppled this entire bridge during rush hour.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

A larger than life statue of a steelworker keeps watch over a closed steel mill.

Francis Julius LeMoyne built this crematory in 1876; he was the third person to be cremated here.

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

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.

The site where nine miners were trapped underground for over 77 hours in 2002.

A piece of crumbling highway infrastructure was repurposed as a high-tech facility for testing racecars.

The penultimate and final resting places of British General Edward Braddock—minus a few bits and pieces.

This historic furnace was once used to produce cannonballs during the Civil War.

A miniature golf course crafted inside the world's largest simulated cave.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A sycamore tree grown from seeds that traveled to the moon.

A wonderous place devoted to art and metal.

A collection of bite-sized buildings creates a magical mini village in the Pennsylvania mountains.

Memorializing an American tragedy of massive proportions.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A bronze ballot box stands at the spot where Susan B. Anthony voted illegally.