Its impressive still-working beam engine is a thing of beauty for engineering history fans.

This pun was simply waiting to come to life, and one defense contractor made it so.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

Once the home of a noted Civil War spy, the two-story brick house now serves as a museum.

These unusual rooms on wheels are holdovers from the 1960s.

The site of one of the deadliest skirmishes during the Battle of Fredricksburg.

This train station inspired the name of a 1970's rock band and provided the backdrop for their album cover.

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

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

Constructed by the younger brother of George Washington.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

Outsider art meets paleontology at this roadside reptile repository.

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

A windswept sandstone overlook offers sweeping views across an ancient plateau.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

A commemoration of child soldiers during a fearful battle of the Civil War.

A grave dedicated to the pioneers who settled California.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

The most loyal of little dogs, or a Victorian era publicity stunt?

A sweet symbol marks the place where torturous executions were once carried out.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.