Take a steam-powered ride straight out of the past on this Appalachian rail line.

The FBI's urban training course may have the highest fake crime rate in the world.

A 100-foot metal tower and swinging bridge that provides stunning views of mountains in five states.

The oldest surviving one-room schoolhouse in Montgomery County, Maryland.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

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

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

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

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

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

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

At this former Prohibition speakeasy, electric birds signaled the arrival of hooch.

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

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

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

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.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

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

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

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

The land is home to swimming ponies and a legendary 18th-century treasure.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.