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

Less a museum than a bizarre fantasy world created by artists and engineers.

One of the world's earliest skyscrapers.

One of few surviving standpipe water towers in the U.S.

Man-made geyser that rises to the exact height of the Gateway Arch.

An urban forest overtakes what was the greatest failure of utopic urban housing.

A floating museum that was sunk by a flood and left to rot in the tides.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.