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

Perhaps the most scandalous statue of America's first president.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A line of blue paint marks the route of the inaugural parade.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The national park was once a plantation estate.

The towering figures were created from the cemetery's fallen old-growth trees.

It was once the base for a series of domestic terror attacks.

Washington's iconic carousel has a nice piece of Civil Rights history.

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

A celebrity from the late Cretaceous period.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A much-maligned monument to teetotalism.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

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

A haunting tribute to pioneering photographer Clover Adams.

The house where John Wilkes Booth conspired with his co-conspirators.

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

Largest Roman Catholic church in North America.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.