The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The "lovely red Vega" of the legendary record-settling pilot.

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

Home to items never before seen by the public.

This restaurant proudly displays bread signed by the 39th president.

The last bastion of Roman presence north of the Alps looms over a German town.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A small but immensely extravagant palace built by the "Night King."

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

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

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.

A tiny waterway named after a ghost story.