This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

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

Home to a protest movement, a bombing, and a dramatic change in labor history.

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

These pretty kitties killed and ate as many as 135 railway workers.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

This historic hotel invented the chocolate brownie.

A lush green oasis in the middle of Chicago.

A science teacher's dream.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

Famously misunderstood wonder of the ancient world

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Largest lake in Great Britain measured by surface area.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The only fixed chain and post trail in Scotland snakes its way along the base of a towering seaside cliff.

The heads of two giant mythological water horses honor Scotland's horselord past.