This memorial honors the first British soldier killed by enemy action on home soil during World War I.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

A swath of France so devastated by war it is still forbidden to go there.

Site of one of World War I's most horrific scenes.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A memorial to the soldiers who died in the bloody battles to control Verdun in World War I.

This single-track road rewards brave drivers with stunning Scottish scenery.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

The first patented shaved-ice machine heralded a snowy wonderland of iced treats at a favorite New Orleans summer shack.

Obscured within a ring of trees, this abandoned World War II relic hides on a German hillside.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The last slot car racing arcade in Brooklyn is keeping the dream of speedy little autos alive.

The oldest living tree in Manhattan comes shrouded in sinister legend.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The early American colonists were such ferocious drinkers the law actually required every town to have a tavern.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.