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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
Empire City Le Hotel
Keystone Keystone MotelThe Best Diner in the World
Gem Locations Ancient Gem Colony ShipAncient Sky ArenaBeta KindergartenCloud ArenaCommunication HubDesertFlower MeadowForgeGalaxy WarpGem BattlefieldGeodeGreat NorthIce CavernJungle Moon BaseLunar Sea SpireMalachite's Realm • Fusion Realm • Mask IslandMoon BasePearl's ArenaPearl's DimensionPearl's TreePink Diamond's ZooPink DimensionPrime KindergartenPrime Kindergarten Control RoomPyramid TempleRose's FountainRose's LandfillRose's Secret ArmorySand FortressSea ShrineSky SpireWarp Space

Homeworld Locations: Abandoned AreaHomeworld KindergartenUnknown CityYellow Diamond's Control Room

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
Attack the Light Indigo CaveRed Temple
Save the Light Secret Temple of Secrets/Danger Dungeon/Pyramid O' Peril/The Spooky Basement • Light Prism's Astral Plane
Comic Locations Canary CoveClock TowerEmpire City Wildlife Rehabilitation CenterMoors of MarcoonUniverse Family Camping Ground