A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A painfully obvious spy house sits right across the street from the Russian Embassy.

Atop this media building, two hives containing more than 30,000 bees keep the surrounding area vibrant.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

When it opened during the final years of the embargo, all the drinks and cigars were free.

The world's oldest soul food restaurant is also one of its best.

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

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

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

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.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

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

Its diverse collection of computers and technology spans the ages.

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

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

The 320-year-old tree that greeted General Lafayette and rerouted an interstate highway.

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 collection of artifacts from Maryland's maritime past.

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.

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