Historic barracks utilized during both the Revolutionary War and the Civil War.

The first blast furnace in the United States that used coal and coke fuel instead of charcoal to make pig iron.

These ruins of an octagonal stone school that was later used as an A.U.M.P. church exemplify a popular school design from the 1830s.

This 19th century machine put animals (including humans) in boxes to study how they metabolized calories.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

Where the oil industry began.

This shop filled with oddities and knick-knacks is named for a 19th-century charlatan.

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

An occult-y, historic hotel with the World's Largest Ouija board on the roof.

A giant ball made from pieces of an old Jeep.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

For decades, it has disappeared and reappeared as water levels rise and fall.

Step into a pastel time capsule where candy is truly dandy.

This collection honors the iconic, and proudly American lighter that just won't quit.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

A nearly century-old amusement park is quietly decaying in a riverside forest in South Carolina.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

A tiny one-room church built after one man's prayer for healing was answered.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

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

A rare view of a preserved Victorian science museum.

These disused steel furnaces are now haunting ruins that may one day be a national park.