This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

This old residential building was once the largest flour mill in the world.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

"The Most Boring Road in the State."

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

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

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

A toxic ghost town sitting atop a massive coal fire.

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

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

A lush green oasis in the middle of Chicago.

A Bibliophile's Dream.

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

The 606 is a decade in the making.

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

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

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

For decades, this waterfall remained hidden because of an artificial dam.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This historic Ohio bridge is adorned with fanciful locks left behind by loving couples.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

A circle of giant painted vases in the former pottery capital of the United States.