The Sky Spire was where the Heaven Beetle resided. Steven, Pearl, and Amethyst travelled here and collected the beetle after a confrontation with Big Bird. The Big Bird had swallowed the Heaven Beetle some time prior to the arrival of the three, and Steven retrieved it while in the Big Bird's stomach. Steven was rescued from the monster's belly by Opal.
Ancient Sky Arena • Astral Plane • the Barn • Beach City • Beach City Woods • Beach House • Crystal Temple • the Forge • Gem Battlefield • the Great North • Hessonite's Warship • Secret Temple of Secrets