America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This historic lighthouse was well known for the large number of women who served as its keeper.

The United States' oldest Episcopal church still in active use.

This abandoned Victorian-style house was built in 1884.

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.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

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 antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

A remote horde of architectural treasures fit for Indiana Jones.

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

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

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

Bizarre Cavern.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

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

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

This free, take-a-book shop seems like a trick but isn't.

Eighteen miniature death-scene dioramas.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.