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

A relic of FDR's brief foray into utopian urban planning.

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

The world's oldest continuously operating airport was founded by the Wright Brothers.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

Two dozen pinball games hidden away inside a most unlikely location.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

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

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

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

The whole world in one water tank.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

Brain collection and database that narrows the gap between man and animal.

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

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

Ship skeletons haunt Baltimore's waterways.

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