Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Home to a vast and influential collection of Shakespeareana.

An Industrial Revolution-era public work that purified water using nothing but sand.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

Two dozen pinball games hidden away inside a most unlikely location.

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

A relic of FDR's brief foray into utopian urban planning.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

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

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

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

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

A hidden alley in urban Baltimore is a haven for graffiti artists.

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

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

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

Ship skeletons haunt Baltimore's waterways.

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This Great Depression-era creation was once known as the strangest house in the world.

The remains of an old sawmill, gristmill and the surrounding industry dating back to the 18th century.