This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

This remote island in Iowa was abandoned after being devastated by flood.

This small, but beautiful waterfall has attracted visits from artists, composers, and two United States presidents.

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

The last location where Buddy Holly, Ritchie Valens, and J. P. "The Big Bopper" Richardson played before their tragic deaths.

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.

A spooky defunct railroad tunnel now part of a sprawling trail.

20,000 pieces in a Frank Gehry-designed building.

This old residential building was once the largest flour mill in the world.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

The only arched bridge made of stone on the entire Mississippi River.

The oldest remaining frame residence in Minneapolis.

This massive roadside mascot was the first version of the giant to illustrate his butt.

The highest point in Iowa, while not that impressive to mountain states, has earned its own monuments.

This 'terrible lizard' was one of the world's first animatronic dinosaurs.

Inside this museum resides a boot fit for a giant.

No one knows the origin of this small town’s unique name.

A unique work of outsider art sourced from scrap metals and signifies conservation.

One of the world's most definitive collections of musical instruments, spanning all cultures and historical periods.

A wonderland of caves in eastern Iowa.

Dedicated to the humanitarian efforts of the state's former governor.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

Once a slice of Cold War-era military history, this museum is finding its future in the stars.

A former waterfront market is now in the center of town due to some interesting Boston engineering.