Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

Largest Roman Catholic church in North America.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

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

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

"X" marks the spot of an echo chamber in the middle of a plaza.

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

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

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Yo, Adrian!

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

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

Was there a small "backpack nuke" hidden in the attic? JFK apparently thought so.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The iconic D.C. restaurant where the Cuban Missile Crisis was negotiated, now a Walgreens.

Before Nixon, "watergate" meant canals.

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

A massive underwater sinkhole made famous by Jacques Cousteau.