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Keystone is a state first mentioned by Greg in the episode "Keystone Motel". Its nickname is "The Great State" and is adjacent to Delmarva, the location of Beach City.

History

"Keystone Motel"

Steven, Greg, and Garnet (who splits into Ruby and Sapphire) take a trip here to stay at a motel called the Keystone Motel (which is a motel named after the state).

Trivia

  • Keystone is based on the real-world U.S. state of Pennsylvania, nicknamed "The Keystone State" due to its central location among the original Thirteen Colonies. The outline of Keystone on Greg's travel brochure resembles the outline of Pennsylvania.


ve Locations
Beach City Businesses: Aqua-Mexican • Beach City Funland (Funland Arcade • Wiener in Hand / Hot Dogs) • Beach Citywalk FriesBig DonutBuddwick Public LibraryClassic ThymeCrab Shack • Connie's School • Danny'sFish Stew Pizza • It's a WashMini-Golf CourseSuitcase Sam'sT-Shirt ShopU-Stor

Residences: BarnBarriga ResidenceBeach HouseMiller Residence (Sadie's Room) • Onion's House
Other: Abandoned WarehouseBeach City PierBeach City StageBeach City WoodsBrooding HillCool RanchDead Man's MouthLighthouseMayor's OfficeUnderwater SwordWater Tower

Crystal Temple Amethyst's ChamberAmethyst's RoomBurning RoomCrystal HeartGarnet's ChamberPearl's ChamberPearl's RoomRose's RoomSteven's BathroomSteven's RoomSardonyx's Room
Attack the Light Indigo CaveRed Temple
Save the Light Secret Temple of Secrets/Danger Dungeon/Pyramid O' Peril/The Spooky Basement • Hessonite's Warship
Empire City Le Hotel
Keystone Keystone MotelThe Best Diner in the World
Gem Locations Ancient Gem Colony ShipAncient Sky ArenaCloud ArenaCommunication HubDesertFlower MeadowForgeGalaxy WarpGem BattlefieldGeodeGreat NorthIce CavernJungle Moon BaseKindergartenLion's DimensionLunar Sea SpireMalachite's Realm • Fusion Realm • Mask IslandMoon BasePearl's ArenaPearl's DimensionPearl's TreePink Diamond's ZooPrime Kindergarten Control RoomPyramid TempleRose's FountainRose's LandfillRose's Secret ArmorySand FortressSea ShrineSky SpireWarp Space

Homeworld Locations: Abandoned AreaUnknown CityYellow Diamond's Control Room

Comic Locations Canary CoveClock TowerEmpire City Wildlife Rehabilitation CenterMoors of MarcoonUniverse Family Camping Ground
Settlements/Cities and Towns Delmarva:Beach CityOcean Town • Charm City • Wilmingmore

Other:Empire City • Surf City • Sea City • Aqua Town • Bayburgh

Countries and States United States of America (DelmarvaJersey • Kansas • Keystone) • Korea
Outer Space Solar System: Earth (+ Moon) • Neptune

Other: Gem Homeworld • Klavius 7Upsilon 9Jungle MoonOthersSectors

Misc. HospitalMaheswaran ResidenceRingo ZoneMinor LocationsGem Homeworld/Locations