A painfully obvious spy house sits right across the street from the Russian Embassy.

Home to items never before seen by the public.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A museum dedicated to the history and exploration of both popular music and science fiction.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Shop selling 500 flavors of soda has something for everyone.

America's most famous piece of self-built architecture.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Elevated freight railway turned wildly successful urban park.

A walk through the historic city center, under the streets of Seattle.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Try not to get slimed in Tribeca.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

One of the oldest, well-preserved water treatment facilities in all of Europe.

A bus with a butt and biceps to put Olympic athletes to shame.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

This doorless 20th-century elevator doesn't stop or slow down.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.