All of Chicago's wood-paved streets are long gone but two alleys remain.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

No one knows how many bodies are in this vault in a Chicago public park.

A giant concrete egg marks this Indiana town as the "Egg Basket of the Midwest."

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

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

The world's largest anatomically accurate brain sculpture.

The chiseled jaw of this forgotten American hero still stands tall in a small Indiana town.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

One-layer pyramid in Indiana.

Modeled after the labyrinth in Chartres Cathedral, this small-town Indiana memorial labyrinth sits half a world away.

A wartime promise becomes a shrine to Our Lady of Lourdes.

In an alley not far from where two great highways meet, byways of a very different sort are honored.

This mysterious hill seems to pull objects uphill.

Nature and art meet in this curvy creation

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

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

Both funky and traditional, it's the oldest of its kind in Indiana.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

The largest land animal skull ever discovered.

The surprising home of the iconic Santa Monica Pier Ferris Wheel.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.