America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Home to items never before seen by the public.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Eighteen miniature death-scene dioramas.

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

Walk through the history of American pop culture.

The Home and murder site of the witch of Rehmeyers Hollow.

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

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.