The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The most decorated dog of World War I is preserved in the Smithsonian.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

A computer bug so primitive it was an actual insect.

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

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

This abandoned sea fort has become an accidental bird sanctuary.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

The Decoy Capital of the World.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

"Try not to knock anything over!"

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

A quarter mile off the coastal tip of Maine you'll find the "Beloved Island" of Franklin Delano Roosevelt.

The largest tidal whirlpool in the Western Hemisphere.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.

The city of Halifax still bears the scars of the largest explosion prior to the atomic bomb.

A morbid piece of memorabilia from the most famous shipwreck in current history is just one of the many poignant artifacts in this Canadian museum's collection.

This Canadian island is a veritable garden of decay with countless abandoned structures dotting the landscape.