Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

This former Indiana quarry has been transformed into a park and SCUBA site where divers can explore the drowned mining equipment.

Display that gathers the basic elements of the universe in one convenient location.

A chapel built by Italian POWs during World War II tells a forgotten tale of the war on the home front.

This turn of the century jail once held Charles Manson.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

One of two identical monuments marking the sites of military training encampments in Peoria, Illinois.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

The remnants of Peoria's proud baseball past stand slightly abandoned, but not forgotten.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

Shop of curiosities with a dinosaur museum tucked in its basement.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

This art center is way beyond your average pumpkin-carving operation.

The library of every book lover's dreams.

The longest structure of its kind ever built in Michigan.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.