The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

Try not to get slimed in Tribeca.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

An eerie site of reverence for those who have completed an epic journey.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

This mighty white oak in Bethesda survived both the American Revolution and the construction of Washington D.C.'s metro red line.

FDR's Art Deco hospital tower was hopelessly inefficient.

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.

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

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

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

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

A well-preserved example of an early industrial operation in the northeastern United States.

Where the famed frontiersman was born, raised, and survived Quaker intrigue

A failed piece of Orientalism has become the proud symbol of a community.

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

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.