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

The walls of the iconic dome are hollow and have a secret stairway.

There’s a hidden military meme engraved on the World War II Memorial.

The oldest continuously operating fish market in the United States.

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

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

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Home to items never before seen by the public.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

This cheery fruit farmer welcomes visitors to a classic roadside emporium.

Volunteers spent years restoring a vintage steam locomotive to operating condition.

High in the Sacramento Mountains, a facility dedicated to studying the sun.

This 47-foot chile pepper sculpture welcomes Scoville heat unit obsessed tourists to the Big Chile Inn.

These unique volcanic rock formations offer the perfect opportunity to camp and hike.

The final resting place of the most famous outlaw in the Old West.

Explore a misty river canyon from a metal bridge system.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

Albuquerque found the perfect use for tumbleweeds at Christmastime.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

This centuries-old pueblo church houses the body of a Franciscan friar who is said to be a rare "incorruptible" corpse.

At this research institute, the chile is king.

The state bird of New Mexico, constructed entirely out of garbage.