The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

Just a man taking his prehistoric pet for a stroll.

A fitting attraction for the corn capital of the world.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This museum glorifies the humble potato.

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.