These medieval skyscrapers dominate the skyline of this small Tuscan town.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

The naturally mummified body of a peasant girl saint.

Fortified medieval tower house with lovely roof garden.

This woodland architectural installation acts as a camera obscura for the heavens.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

One of the few surviving original NASCAR dirt-track speedways.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A display of magnificent stained glass windows is the first exhibit of its kind.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This historic hotel invented the chocolate brownie.

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

An enormous park-like oasis, full of famous Chicagoans’ graves.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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