An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

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

A former major munitions plant that has been converted into a sprawling art space.

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

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

A historic arena where the Beatles played their first concert in the U.S.

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

Art deco landmark on the outskirts of Washington, D.C.

The national park was once a plantation estate.

The oldest continuously operating fish market in the United States.

A super-sized promotional trick that is now a D.C. landmark.

Largest Roman Catholic church in North America.

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.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

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.