This university transit system is a 1970's vision of the future.

The world's largest fully steerable radio telescope.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A nostalgic bibliographic gem.

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

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

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

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

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Look closely and you’ll notice that the color changes a third of the way up the tower.

The bank that helped fund the Mexican-American War and the purchase of Alaska met its downfall after helping Augusto Pinochet launder money.

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

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

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

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Obscure Freemasons still live in D.C.’s largest private residence.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.