One of corporate America's best-kept secrets is also one of the most publicly displayed.

An underground magnet for ever-changing street art.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

To find the final resting place of a golf legend, just look for the grave covered in golf balls.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

This extraordinary model train layout covers over 1,700 square feet, with multiple trains running simultaneously.

The trials and tribulations of marking Poe’s grave.

Yo, Adrian!

The world’s first penitentiary, meant to be humane, drove men insane.

The land is home to swimming ponies and a legendary 18th-century treasure.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A local prank turned town icon.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This jail which was in service for over a century is now open for curious visitors.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A field of nothing but boulders which resembles a giant's gravel driveway.

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

Construction uncovered this trove of fossils, which visitors are welcome to add to their own collections.

A eight-foot-tall statue resides in the heart of Pennsylvania anthracite coal country.

An underground blaze turned this village into a ghost town.

A toxic ghost town sitting atop a massive coal fire.

A comprehensive collection of toy and model trains, largely from the mid-20th century.