One of the world's oldest continually operating bookstores.

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

A fascinating community art piece created by students, teachers, and noted Philadelphia artist Isaiah Zagar.

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

A toxic ghost town sitting atop a massive coal fire.

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

Designed by the company that provided water to the entire community.

America's oldest drive-in movie theater has been in continuous operation since 1934.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

Once used as a deterrent to drinking alcohol.

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

Look closely and you’ll notice that the color changes a third of the way up the tower.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

This Asheville chair museum wants to revive a dying art.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A collection of full-size movie monsters opened to the public.