The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

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

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

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

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

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

A classic carnival ride that was carved to be untouchable.

The old fire tower is one of the last of its kind in the United States.

Touch an actual dinosaur bone at this eclectic trove of Rocky Mountain treasures.

A smoke stack so large, the Washington Monument could fit inside!

The oldest continuously-operating Chinese restaurant in the United States has been in business since 1911.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

A small Montana town commemorates the dog who waited at the train station every day for his owner to return.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

These giant metal horses graze on a hilltop near the Montana highway.

See the computer’s history revealed over the course of 20,000 years.

"Polynesia on the Plains."