What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

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

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

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

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

The highest point in Wisconsin is capped by two towers that are not as mythic as Tolkien's but provide much better views.

The arboretum whose marshy soil sucked up the dreams of housing developers.

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

"The Most Boring Road in the State."

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

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

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

A one-stop shop for all things snowmobile, started by a snowmobile-obsessed group of friends in Wisconsin.

The only Frank Lloyd Wright-designed structure in the architect's hometown.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

No one's quite sure where this quirky university tradition originated.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The rogue roots are gradually consuming some of the historic marble grave markers.

Almost half-way between the Equator and North Pole.