A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

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

The United States Capitol's former columns still stand.

An eerie, decaying ghost town destined to fade into the forest.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

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

A collection of artifacts from Maryland's maritime past.

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

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

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

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

This abandoned sea fort has become an accidental bird sanctuary.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

Ship skeletons haunt Baltimore's waterways.

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.

Bizarre Cavern.

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

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

This free, take-a-book shop seems like a trick but isn't.

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

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