Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Avoid gangster interaction while window-shopping.

The site of the deadly Triangle Shirtwaist Factory Fire.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

The highest rapid transit station in the world.

One of two giant blue cockerel statues erected with an intentional double meaning.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

This iconic water tower and failed bandstand is open for panoramic views once a year.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

Built in 1933, this unique ballroom is nicknamed the "floating dance floor."

Meet the "Green Monster" of Monico, Wisconsin.

The oldest remaining frame residence in Minneapolis.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

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

Millions of dollars worth of sculpture decorate this Iowa city center.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

A restaurant and lodge in northern Wisconsin which served as a clandestine hideout for John Dillinger and featured one of the most famous botched FBI raids in history.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

This massive roadside mascot was the first version of the giant to illustrate his butt.