This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

The final home of the most famous horse of the American Civil War.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

A former pillar of the Black community in Ellicott City.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

The world's largest collection of historic U.S. military naval vessels.

This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

This extraordinary model train layout covers over 1,700 square feet, with multiple trains running simultaneously.

A comprehensive collection of toy and model trains, largely from the mid-20th century.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

The arch marks the beginning of the road for northbound travelers.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

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

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

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

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Mysterious stone tower featured in many alternative histories of the New World.

Dedicated to the explorer who opened Japan to the West.

This observation tower is a longstanding, 1960s landmark in the Thousand Islands region of Canada.