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

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

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

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Dozens of large steel sculptures fill this two-acre park outside a former blacksmith's studio.

One of the few Cold War-era bases with many of its original structures still standing.

"The Most Boring Road in the State."

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A fitting attraction for the corn capital of the world.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This friendly fellow was built to honor an advancement in mineral processing.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

The only arched bridge made of stone on the entire Mississippi River.

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

When flour explodes, it's not a pretty sight.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.