The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

This abandoned sea fort has become an accidental bird sanctuary.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

Walk through the history of American pop culture.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

Ship skeletons haunt Baltimore's waterways.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

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

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

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

This former asylum for Black Americans is haunted by its history of violence and racism.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

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

A priceless collection of the Nation's cryptologic history.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Tiny observatory made big contributions to the study of the Earth's motion.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.