Spanish Colonial Fort Discovered in Saint Charles County, Missouri - Intact!

What was thought to be a barn was discovered to have a stone fort inside of it:

See the article, Fort built in 1793 will now guard area's past.

"In 2004, as developers cleared farmland on the site, they discovered that the barn had a unique interior. The barn was wood on the outside, but on the inside, four thick stone walls held up its second floor. The stone walls formed a room on the barn's first floor, which was probably once used as a livestock crib."

The fort is being rebuilt nearby at Daniel Boone's home.