One car at a time please.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

The resting place of a Civil War celebrity's amputated limb.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The national park was once a plantation estate.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.

The center of the only hemisphere that awards visitors with a commemorative coin.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This landmark cemetery in Boston was created more than 300 years ago.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A downtown park built on top of unclaimed graves.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

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

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

This magnificent Cincinnati graveyard is also a popular public park.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The grave of Mary Nasson is shrouded by witchy legends.