Once the largest windmill outside of Holland, with enormous 114 foot sails.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

This turn of the century masterpiece has a mysterious goaty interloper.

Visible below the waves are memorials to the city's Gold Rush dead.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A huge musical instrument played by the ocean.

The palatial McDonald's that inspired Wesley Willis.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

A display of magnificent stained glass windows is the first exhibit of its kind.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

The faint remains of a Polish news empire still linger.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

A chance to follow in the footsteps of the word's most legendary animator.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

Illegal drag racing two stories beneath Chicago’s streets.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

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

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.