The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

This old residential building was once the largest flour mill in the world.

Thousands of people walk over this fantastic work of art every day, but how many notice it?

The world's largest floating loon bobs in the lake to kick off an annual festival.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

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

Coins and medals straight from the mint await visitors to this shop in the nation's capital.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

This forgotten boat elevator was an engineering marvel in its heyday.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

The only thing these street signs will help you navigate is your imagination.

These markers are used to document elevation changes around the famed dam.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

Every year, the colorful murals of Montreal get a complete makeover.

A diorama of the Civil War, fought by cats.

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

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

Final remnants of the 1895 Cotton States and International Exposition.

This town is home to the world’s largest arch constructed entirely of elk antlers.

This water tower has been a staple of the Rochester skyline since 1931.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).