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

An unusual sculpture, an interesting history, in a strange place, for a good cause.

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

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

A historic cemetery with unique artwork, a Civil War fort, and also happens to be the site of the Battle of Bladensburg.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

A collection of artifacts from Maryland's maritime past.

The former headquarters of history's oldest megacorporation.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

"We Seceded Where Others Failed."

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

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

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

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

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

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

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

Wedged between two sets of row houses is an awkwardly located family graveyard.

The trials and tribulations of marking Poe's grave.