The world's longest covered bridge is a quaint and incredible wooden tunnel.

Go inside the house that inspired L. M. Montgomery to create one of literature's most beloved heroines.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

The largest source of fossilized insects anywhere.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

This 16-foot-diameter wooden coin has been standing in Iowa City since 2006.

The Iowa state contender for largest pan in the world oddly only comes in second or so.

Eight feet in diameter and more than 24 feet around.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

A seven-ton black granite monument dedicated to the memory of those who died and those who lived through the 1977 crash of the popular Southern rock band.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

No matter what the plaque under this massive legume says, this is not the world's largest peanut.

The World's Largest Bull.

The world's largest fully steerable radio telescope.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.

The taxidermy remains of the most popular pony in children's literature.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

The highest point in Virginia can only be reached by passing through ponies and flowers.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Prehistoric animals decorate this popular outdoor park.

A local scoured more than 1,000 acres for stone to create his masterpiece.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.