This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

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

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

These mansions date back to Chicago's days as a brewer's paradise.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

Huge abstract sculptures of the Puerto Rican Flag.

Orthodox church partially financed by Tsar Nicolas II.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Once an ornate movie theater remade by Catholic Charities.

Landmark Chicago building narrowly avoided destruction.

A Chicago Movie Palace Lost to Time.

An eccentric park and pool.

A bloodstain from "the wound of the transverberation of the heart."

A unique 3-D sculpture based on Rene Magritte’s “The Red Model.”

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

The largest interactive exhibition in the U.S. exploring human history through the lens of power, punishment, and psychology.

A hot dog stand where the heads are just as hot as the dogs.

A monument to the art of slicing people open.

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

A lush green oasis in the middle of Chicago.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

Designed by Alfred Caldwel, this landscape showcases his vision of a native garden.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.