Moscow's imposing monument to the Space Age.

Former headquarters of the KGB.

Museum celebrating the achievements of the Soviet space program.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

At the birthplace of American railroading, a world-class collection of historic trains.

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

FDR's Art Deco hospital tower was hopelessly inefficient.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

This lifelike sculpture of a policeman serves as a helpful reminder to watch out for crossing pedestrians.

This historic lighthouse was well known for the large number of women who served as its keeper.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The land is home to swimming ponies and a legendary 18th-century treasure.

The oldest platform carousel built in the United States continues to delight children in Martha’s Vineyard.

This candy-colored storybook village originated as a 19th-century Methodist campground.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

The scarce remains of a sunken ship peek out from the sand on East Beach.

The filming location of a shark attack in Steven Spielberg’s famous shark movie.

The largest earthwork effigy in the world.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.