Love or hate them, the Works Progress Administration kicked out some enduring projects during the Great Depression years. Several masonry projects located in the 42N area include the construction of city and state park structures like stone paths, stairs, shelters and scenic lookouts. Many of these stone works have survived into the 21st century with all the intended natural charm of quality design and construction. This example of a WPA project is located in Clinton, Iowa's Eagle Point city park. It is simply known as the castle.
Just add a few knights, a secret passage or chamber and Templar treasure and you have all the makings for a blockbuster book or movie. Know that.