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

A Bibliophile's Dream.

This shop for all your super spy needs hides an educational secret.

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

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

This seemingly cursed monument is dedicated to one of Canada's great war heroes.

Quite possibly the last cross all humans will ever see.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Genesis of modern hydroelectric power.

Toxic waste disaster that founded the Superfund program.

A natural gas leak provides a flickering flame beneath a waterfall.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

At 207 feet, one of the world's longest continuous escalators.

The site of the climactic scene from the classic horror film is now a historic landmark.

The "lovely red Vega" of the legendary record-settling pilot.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.