So many migrating birds roost on the bridge, it has a special summer speed limit.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

Memorializing an American tragedy of massive proportions.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

This dramatic rail curve was once the target of a failed Nazi attack.

Steepest flood safety railway in the entire world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This elaborate towering structure was once famed for its revolutionary height.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Yo, Adrian!

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The first American department store, and home to the largest operating musical instrument in the world.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The headquarters of the famous Yale society.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.