The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

Eternal resting place of the grave robber and murderer who served as inspiration for many of cinema’s famous madmen.

One of Frank Lloyd Wright's final works was this UFO church.

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

More than 5,000 contemporary and "historic" mustards from around the world.

The birthplace of a titan of American cinema.

This whimsical sculpture garden is a local treasure.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

Glass and concrete building designed by Albert Kahn.

The concrete shell of an industry giant remains as a playground for graffiti artists, auto scrappers, and paintball warriors.

The bones of an old zoo crumbling in the shadow of a new one.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

A Beaux-Arts triumph set to become Ford's innovation campus

This popular cave pool is truly magical, despite the crowds.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The "lovely red Vega" of the legendary record-settling pilot.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.