Nearly 40 miles and 1,000 years of limestone mines under Denmark.

This church carved into the rocks is full of enchanting stone statues.

A mysteriously dark cemetery monument fuels stories and legends galore.

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.

At a mile long, the Fort Madison Bridge is the largest double-decker swing-span bridge in the world.

Step back in time while shopping inside this local store.

This small museum is dedicated to one of the most influential, yet obscure, jazz legends of Prohibition.

What was once a communal kitchen now serves heaping portions of hearty German fare.

A wonderland of caves in eastern Iowa.

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

This tiny site in Iowa, part of a patchwork national wildlife refuge, is home to ancient flora and fauna.

Hidden in the grounds of the Fort Dodge Museum is a "real" and terrifying petrified giant.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

An underground wonderland in Iowa.

Elaborate hand-carved wooden clocks two brothers made in their spare time are on display at this handsome little museum.

The oldest university museum west of the Mississippi retains its 19th century feel.

Eight feet in diameter and more than 24 feet around.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

While there are no actual snakes in the history of this crooked road, there may be a number of dead horses.

The notorious couple camped at this site after a bloody shootout with police.

Millions of dollars worth of sculpture decorate this Iowa city center.

The remains of a bustling turn-of-the-century park built to showcase the wonders of electricity.

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