Supposedly Satanic numbers adorn this preserved submarine sail.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

An overlooked memorial honoring the local Washington residents who died in World War I.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

Legends surround this jagged rock formation in the New Mexico desert.

Oddly shaped rock formation, misassociated with a nearby utopian community.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

The world's largest Holstein cow.

One man's quest to save his town with a trail of record-breaking sculptures.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Metal sculpture folk art lining the Kansas Highway.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The arch that celebrated the completion of the Lincoln and Victory highways.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Herbert Hoover's "Brown House" rural presidential retreat was a PR disaster amid the start of the Great Depression.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This historic sunny-yellow building has an unfortunate connection to the sinking of the Titanic.

So many migrating birds roost on the bridge, it has a special summer speed limit.

The rusting remains of the largest assembled WWII fleet on the West Coast.