Museum dedicated to the art of cutting and polishing stones.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

Cold War missile launch site which has been converted to a public park.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

World's second largest particle accelerator, where nature reveals its secrets.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

The final resting place of the world's first nuclear reactor.

The face of a woman pushes its way through the earth.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Former meatpacking facility turned vertical farm and sustainable business complex.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

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

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

One of the largest carillons in the world, this giant instrument has 67 cast-iron bells played by a keyboard.

This odd stone memorial remembers a loyal dog who offended the rail barons with his speed and saved his master with his pee.