Rare recess caves fill this unbelievably beautiful Ohio park.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

One of the best-preserved Native American mounds remaining in the southern United States.

The mounds at this site were reconstructed with the help of archaeologists and historians.

This unassuming city park is home to three different types of Native American mounds.

Built in France in the 1400s, this gothic chapel now resides at Marquette University in Milwaukee, Wisconsin.

This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

The property contains 37 preserved animal effigy mounds constructed by Native Americans between 800-1100.

A historic ballroom host to famous performers from the big band era to 1980s rock.

Explore a real 19th-century lead and zinc mine at this immersive series of exhibits.

The tragic death of 19-year-old Mabel Tainter in 1886 led to the construction of this unique Victorian-era theater in the northern woods of Wisconsin.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.

The site of an ancient Mississippian settlement that appears to have flourished during the 10th to 13th centuries.

Built in 1933, this unique ballroom is nicknamed the "floating dance floor."

Museum with an extensive collection of Cray supercomputers and related artifacts.

The museum houses one of the world's largest collections of glass paperweights.

This storied music venue was once a tavern that housed an Italian Anarchist book club and prohibition parties; today it's a community space for artists and musicians.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

Where experiments are conducted on all things wood.

The remnants of this Douglas fir predate Columbus's arrival in North America.

A Milwaukee museum provides an unsparing and ultimately empowering look at the Black American experience.

This lakefront cottage was crafted in the 1800s and was once a sanitorium.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.