A tribute to those that perished during the American Revolution.

A statue commemorating a 16-year old girl's nighttime ride to raise a militia against attacking British troops.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

Mining town from the late 1890s, once home to Calamity Jane.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

A toxic ghost town sitting atop a massive coal fire.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

Abandoned Air Force base that has fallen into disrepair.

The beauty of urban decay, hiding some dark secrets.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Odd outsider art installations surround a Gold Rush-era ghost town.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

World's first "penitentiary," meant to be humane, drove men insane.

Homestead Cemetery hold the remains of the United States' first known professional tattoo artists.

This monument to the victims of a tragic explosion is said to turn and look at passing cars.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.