The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A rim-made reptile in North Dakota.

A monument to the center of the North American continent may be off by a few miles.

A true roadside icon standing on the same plains that the herds once roamed.

The only road through the heart of Glacier National Park.

The largest earthwork effigy in the world.

The largest ancient burial mound in Ohio.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

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

Home to items never before seen by the public.

This free, take-a-book shop seems like a trick but isn't.

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”

The trials and tribulations of marking Poe’s grave.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Gargantuan home of Russian science.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

Cold war icon and onetime "hole" in the iron curtain.

Art and a pun, all in one.

The most visited, and possibly most controversial, museum in Germany.