A toxic ghost town sitting atop a massive coal fire.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

Commemorating the spot where the famous scientist fed his pigeons.

The former hotel where Tesla invented the radio.

This fairytale-inspired cottage was created by a university literature professor.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The final resting place of New Orleans' most famous voodoo priestess.

A museum dedicated exclusively to aircraft used in the military.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

An astounding collection of medical specimens, including bits of President Lincoln.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A museum dedicated to exhibiting remarkable outsider art.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

Remnants of a storybook amusement park hidden behind a strip mall.

An outlandish shoe shaped house built by an eccentric millionaire.

Bizarre Cavern.

A Civil War Museum with some notable medical antiques.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.