This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

This historic hotel invented the chocolate brownie.

A lush green oasis in the middle of Chicago.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

A haunting tribute to pioneering photographer Clover Adams.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Home to items never before seen by the public.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A six-story-tall golden pyramid, surrounded by a moat.

Former bath house turns gastropub.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

"Mock all and sundry things, but leave the saints alone."

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

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

A massive sustainable farm designed by the mastermind behind Central Park.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.