The 28,000-year-old specimen is remarkably intact.

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

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

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

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

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

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

There’s a hidden military meme engraved on the World War II Memorial.

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

A museum dedicated exclusively to aircraft used in the military.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

The ballpark in "Pigtown" where the Brooklyn Dodgers made their name was replaced with a huge apartment complex.

The famed amusement district marks the beginning of summer with a wild procession of nautical creatures.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

There must be a pun in this haystack somewhere...

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”