A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The legendary building that needed ghostly approval before being built.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Because sometimes the most efficient route from A to B isn't a straight line.

An epic sculpture depicting a wagon and straining oxen.

Honoring Italian greats from Joe DiMaggio to Rocky Marciano.

Location of the Real World's disastrous, and protested, eleventh season.

Huge abstract sculptures of the Puerto Rican Flag.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

This historic-shipwreck-cum-diving-spot can still be seen poking its boiler out of the Lake Michigan waters that claimed it.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

The beloved home to all publications indie, erotic, and punky.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

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

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

The subtle science of a master molecular gastronomist.

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

A collection of collections ranging from dentistry to minerals.

A subterranean house of worship carved right out of the bedrock.