The Mausoleum of Sun Sparkle is the supposed tomb of the unicorn archmage and admiral Sun Sparkle (b. 174 AE, d. 283 AE), of the Royal Equestrian Navy, who died while on a voyage of exploration in the Ocean of Dreams. The Mausoleum was maintained and expanded over the next several decades by subsequent expeditions, as Equestrians wished to honor her memory but were reluctant to move her remains away from the of the world to which she had devoted her later career, and indeed had explicitly requested to be buried after being mortally wounded by a giant slug monster. Various stories place it in several locations in Eastern Ponyland.