These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A historic covered bridge, only one of two remaining in North Carolina.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

A replica of where the Last Supper was held.

The trials and tribulations of marking Poe's grave.

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 bones of an old zoo crumbling in the shadow of a new one.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

This ghost town houses the remains of Alabama's old state capital.

The century-old remains of an abandoned farm town in eastern Washington.

The final resting place of one of Thomas Jefferson's formerly enslaved sons.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

This prison-turned-museum is a remnant of the Old West's grizzly, violent past.

The only retired U.S. nuclear missile silo that is open to the public.

During the 1990's nearly all of the world's LSD is thought to have come from the operators of the lab once located in this missile silo.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

The largest ancient burial mound in Ohio.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.