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

This bell is one of the last remnants of the lost city of Triadelphia.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

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

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

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

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

The Forest Service's surprisingly sophisticated collection of wildfire prevention art features America's most beloved bear.

Art deco landmark on the outskirts of Washington, D.C.

George Washington once stopped by this house for dinner.

This Georgian-style house built in 1746 is the oldest surviving structure in Bladensburg.

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

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

This historic building is now home to the Public Access Corporation for the District of Columbia.

Home to two notable early-20th-century Black educators, Lucy Slowe and Mary Burrill.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

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

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

Once the center of a thriving early Black community called Martinsburg.

Using a massive antenna made up of five miles of wire, two scientists tuned into organic radio waves from the planet Jupiter.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

A massive white oak tree provides a beautiful canopy near a suburban shopping center and stood before the signing of the Constitution.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.