A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

This bridge was constructed from the remains of the first Ferris wheel.

A large collection of motorbikes with some impressive gems.

A giant concrete egg marks this Indiana town as the "Egg Basket of the Midwest."

In 1932, Americans honored their first president's 200th birthday by planting trees.

Honoring combatants from Portsmouth who served in Cuba and the Philippines during the Spanish-American War.

Mass grave of 50 unidentified French Soldiers who died at the Siege of Yorktown, 1781, that gave victory to the American Revolution.

One of the Treasury Building's original columns now sits as a garden monument in the middle of a busy military base.

John Tyler never got to be buried at his beloved home, but every pet his family owned since has been.

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

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

In what is rumored to be an intentional act of spite, this memorial almost completely obscures the nearby grave of a senior officer.

This Federal-style plantation house was once visited by Abraham Lincoln to meet with generals during the Civil War.

Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

The solitary grave of a schooner captain killed by lightning while serving biscuits.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

The final resting place of a controversial man who was instrumental in plucking the banjo from obscurity.

The former home of the man whose radical ideas changed the nation.

A lightship turned museum, outfitted with artifacts from the vessel's past as part of the U.S. Lighthouse Service.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Where pardoned turkeys once spent their all-too-brief final days.