Bishop Castle in Rye, Colorado stands at 9,000 feet elevation in the Wet Mountains as the world's largest one-man construction project. Built by Jim Bishop from 1969 to 2019, the castle features impressive rock walls, arched windows, round tower-like structures, and distinctive stonework including the Great Wall, constructed without concrete. Operated on a donation basis and originally maintained free to preserve it as a place of American freedom, the castle remains open daily at sunrise to sunset and welcomes visitors from around the world to appreciate its unique vision.