The Sugar Castle, displayed in the historic Westin St. Francis hotel in San Francisco, took over 400 hours to create. Executive Pastry Chef Jean-Francios Houdre was inspired by European architecture and used a variety of tools for this construction, including X-Acto knives, glue guns, and rulers. The piece features a motorized base which allows the castle to slowly rotate. A hole in the base accommodates wires for the lights in the pulled-sugar-paned windows. Houdre recommends that you overbake your gingerbread for about 20 minutes, then leave it to cool in an open oven for about 45 minutes for a sturdier structure.