The graffitied ruins stand hidden within the Pennsylvania woods.

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

This decommissioned surface-to-surface missile resides outside the American Legion Post in Pennslyvania.

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

Journey through a collection of over 35,000 Halloween items from all generations.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

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

An American flag was erected for every day that passed during the Iranian Hostage Crisis.

The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

This university transit system is a 1970's vision of the future.

The actor best known for slapstick comedy is memorialized in his home town.

A well-preserved relic of the industrial age steel and iron works that dotted West Virginia.

There are more than 4 million bricks inside this unofficial Lego museum in a former middle school.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

A larger than life statue of a steelworker keeps watch over a closed steel mill.

A storybook church made from a mesmerizing medley of multi-colored stones.

This tiny museum kept in a B&B laundry room holds the death mask of notorious bank robber Pretty Boy Floyd.

Housing the history of a small Ohio town that is known to some as the pottery capital of the United States.

After covering almost 1.5 billion acres, the survey's still not finished.