Largest outdoor staircase in the United States.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

The center of the only hemisphere that awards visitors with a commemorative coin.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

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

Five acres of divinely inspired folk art.

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

In Grand Rapids, Michigan, a marker honors the creation story of a proud fictional culture.

At HopCat, a marker honors fictional creatures with the ability to travel the missing dimensions of Kcymaerxthaere.

A lovely hidden waterfall right off the highway is well worth a stop.

This solitary gravestone is separated from the rest in Appleton, explaining why local legends continue to surround it.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

This family driveway also serves as the highest point in Illinois.

The former home is said to be haunted by the ghosts of the beloved mayor and his wife who lived here.

This cave holds a surprisingly colorful variety of geological oddities.

A Michigan farm has hosted the fierce competition since 1974.

Robots, lasers, and whoopee cushions, oh my!

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

This deceivingly ordinary warehouse hides an enormous collection of pop culture treasures.

This baseball diamond was home to the Rockford Peaches, a team featured in the hit film "A League of Their Own."

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

Legend says Dungeons and Dragons players can get their dice blessed at the creator of the game's memorial.