This grave marks the final resting place of pioneer John Chapman, better known as Johnny Appleseed.

The third-oldest baseball stadium in the United States is in a league of its own.

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

A relic of the Cold War in Chicago.

An easy-to-reach, century-old shipwreck in shallow and crystal clear waters.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

One of the first intercontinental ballistic missile sites in the United States.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Once luxurious, these oceanfront beach homes have been left to succumb to the elements as the beach is slowly washed away.

Despite its name, this route in southern Utah offers a heavenly day trip.

Rare recess caves fill this unbelievably beautiful Ohio park.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A lawless town deep in Death Valley was famous for its riches and death rate.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

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

A crumbling hospital from the 1850s on Roosevelt Island.

The remnants of an early American attempt at missile defense.

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

This former mining town was named the most toxic town in America.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

Once America's longest-manned military fort, now an abandoned hulk.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.