The United States's largest hand-dug well is topped with a state-of-the-art museum.

A unique attraction and museum dedicated to exploring iconic roadside structures.

This boulder with a 200-word legal dedication to God has remained hidden in the woods for over 150 years.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

Strange physical sensations and optical contradictions keep visitors coming back for more.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

This 19th century Sioux City candy company is the home of the Twin Bing, a historic, chocolate-covered treat.

Grant Wood painted some of his most famous works of art at this studio.

This hand-carved wooden carousel in the Story City North Park was built in 1913.

How did the 110-foot limestone statue cross the road?

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

This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

Largest gathering of hobos in the country has been meeting annually since 1900.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

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

A mysteriously dark cemetery monument fuels stories and legends galore.

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

A single artist is behind these large-scale models made of hundreds of thousands of two-inch wooden matchsticks.

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

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

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

A surprising collection of bronze faces beneath a bridge in Loveland.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Built in 1981 in collaboration with Andy Warhol, this giant piece of pop art stands on the campus of Colorado State University.