Over the summer, Roberta and her husband, Steve, and their friends, Chuck and Iris, visited the marvel of construction and decor, Fonthill, in Doylestown, PA. Her report — and Chuck’s pictures — highlight the concrete castle’s details and its maker’s obsession with creating both a home to live in and a showpiece for his tile-making enterprise. Sometimes, Roberta says, the best trips are hiding in plain sight in your own backyard.