Some sort of a fortress at the top of a hill, somewhere down the road from Trinity Site. Built there by the Jaredites (people the Mormons said came to the US in the Bible period and might have been either friends or enemies of the Indians)... or by the Babylonian architect who, embarrassed by the fall of Babel, left town with them, and since that time has been reduced to smaller, more practical, and eventually longer lasting structures.
I did know that once I had traveled across the ocean, to Basra, in Mesopotamia, in order to find the Tower of Babel.