A celebrity from the late Cretaceous period.

The most accurate timepiece in the world.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

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

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

A haunting tribute to pioneering photographer Clover Adams.

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

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.

A historic neighborhood church is reborn as a psychedelic arts collective.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

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

At 207 feet, one of the world's longest continuous escalators.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The rogue roots are gradually consuming some of the historic marble grave markers.

The romance of early commercial flight still fills this Art Deco destination.

A former major munitions plant that has been converted into a sprawling art space.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.