This covered bridge was used by both Union and Confederate troops during the Battle of Gettysburg in 1863.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

This Civil War monument was designed by an eccentric architect and Gettysburg veteran.

This eye-catching sculpture of rural life seems a bit out of place at a suburban intersection in front of a car dealership.

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

A merry-go-round that became a rallying point for the early Civil Rights Movement.

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

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

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

The home and final resting place of the first native-born American saint

Exact replica of the ancient monument, but much, much lighter.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The whole world in one water tank.

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.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

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

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

This suburban park recalls the history of a famous tavern. Despite the name, it's no ordinary place!

This heritage museum highlights the importance of the dairy cow as a vital part of rural Maryland's past, present, and future.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

Once damaged by Hurricane Agnes, this bridge is now on the National Register of Historic Places.