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

The United States Capitol's former columns still stand.

The whole world in one water tank.

A remote horde of architectural treasures fit for Indiana Jones.

A Civil War Museum with some notable medical antiques.

An abandoned church gets a second life as a massive beer hall and event space.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

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

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

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

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

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

Ship skeletons haunt Baltimore's waterways.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

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

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

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

A priceless collection of the Nation's cryptologic history.

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

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

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