This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

The only home of the famous French impressionist painter open to the public is now a museum and bed and breakfast.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

This quaint museum in a long-running workshop is dedicated to a fixture in New Orleans lighting.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

A 19th-century horse lover's bequest led to the construction of this unique fountain in Chicago.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

This historic-shipwreck-cum-diving-spot can still be seen poking its boiler out of the Lake Michigan waters that claimed it.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

This monument owes its name to a quote by the famous civil rights activist and journalist.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

Former meatpacking facility turned vertical farm and sustainable business complex.

A relic of the Cold War in Chicago.

First planned industrial community in the United States.

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

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

A one-armed veteran of the Battle of Waterloo lies in a cemetery for one in the middle of a Chicago scrapyard.

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

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