Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

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

This park contains a number of standing stones meant to heal and inspire.

A toxic ghost town sitting atop a massive coal fire.

One of the world's largest model railroads is a mind-boggling achievement.

A unique sculpture park that specializes in the huge and bizarre.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

A former plant in one of the hubs of U.S. steelmaking has been turned into this museum celebrating the history of American industry.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

In which a local geological marvel becomes a quaint roadside attraction.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

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

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Dr Barnes' $25 billion private collection of art and arboretum.