One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Decades before the scandal, this staircase on the river was a literal "water gate."

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

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.

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

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

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

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.

Fake rail crossings mark the site of an influential doctor's demise.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

Budapest's Communist-era statues, banished to the suburbs.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.