A few decades later, Seibert is still making sand castles, though today they tend to be much, much more sophisticated. His castles resemble less the complicated towers and moats of fairy tales and more the brutalist structures of his architectural inspirations like Paul Rudolph, Gottfried Bohm and Giovanni Michelucci. “I always had an affinity for architecture which I attribute to growing up in a neighborhood and town that was constantly under construction,” he says. “As I was becoming more aware of the architecture in the wider world, Brutalism was one of the styles of the moment.”