The World's Largest Bull.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

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

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

Home with Gothic windows featured in a famous painting.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

This zombie-themed restaurant stands out in the heart of corn country.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

This pebble beach is so beautiful that taking its rocks is against the law.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

The world's tallest turtle riding the world's largest snowmobile.

The world's largest Holstein cow.

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

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

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

Native Americans built this circle of stones, which was used to predict astronomical events.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

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

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.