A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A scrap-metal sculpture recalls an infamous 19th-century camel.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

This sanguine boulevard was named after a deadly cowboy bar fight.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

The narrowest house in America is seven feet of pure spite.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

The first memorial dedicated solely to the Black troops who fought for the Union.

These boots are made for selfies.

Three hundred years of preserved Spanish colonial history in San Antonio.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

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

Go take a picture with the inventor of the daguerreotype photographic process.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

Perhaps the most scandalous statue of America's first president.

The national park was once a plantation estate.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

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

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”