A notorious Route 66 eatery once frequented by Al Capone.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

This little barrel-shaped cottage by Lake Superior was once a cartoonist's summer retreat.

As its grandiose name implies, this wooden dome is unsurpassed in size.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

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

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

This is not your typical jungle gym.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

Large one-man sculpture park in Michigan.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

The first declared National Monument in the United States.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Cannon designed to fire an atomic warhead.