A wonderland of caves in eastern Iowa.

An underground wonderland in Iowa.

Although outnumbered, the Tecumseh Confederacy defeated a large regiment of United States troops.

World's largest pet casket company brings in up to $5 million per year in revenue.

A memorial to the Potawatomi chief who allegedly ran nearly 150 miles to alert settlers of an impending attack.

The last remaining tollhouse in Michigan built during the 19th-century plank road craze.

This unusual three-way wooden foot bridge spans two rivers at once.

It's gunky, it's gross, and it's been freed from the sewer and put on display.

This tree was warped centuries ago to serve as a botanical wayfaring tool.

Largest outdoor staircase in the United States.

This Native American cemetery features decades-old spirit house hidden behind pine trees and moss.

On the shores of Lake Superior, a small group of monks makes sacred sweets.

A cemetery where many of those buried had a flair for the dramatics.

A series of 33 stone markers maps an ancient 55-mile transportation route.

A collection of more than 10,000 racist objects that teaches the atrocities of social injustice and intolerance in American history.

Large pioneer village showcasing life during boom times.

This historic Jewish cemetery sits right in the heart of a Detroit car factory.

Housed in the university planetarium, the thousand-strong collection of tiny towelettes includes a used one from the hosts of Car Talk.

This little barrel-shaped cottage by Lake Superior was once a cartoonist's summer retreat.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

Standing guard on top of an old, vacant ice cream shop.

These gardens recreate unique and endangered Michigan habitats.

The 10-foot-tall vegetables belong to Michigan’s first food rescue program.

One man’s vision of living among dinosaurs credits Jesus Christ as the engine of biological evolution.