Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

There aren't too many operational funiculars around, but Pittsburgh has two!

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

This small-town pizzeria won the Hollywood lottery.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

An enormous, inside-out glass globe built in 1935.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The only surviving prototype for Buckminster Fuller's house of the future.

The unusual medical inventions of the man who gave the world Corn Flakes.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

An ever-evolving wall of graffiti art off East Liberty Street.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

World's largest Christmas store.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

Trade in that pesky human soul for cold-hard circuits.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.