World map/Locations×Boss Encounter, Zaros's BastionMap iconFloorSurfaceSquare3099, 6882Region12395Share locationNearbyBoss Encounter, The HeartSurface 3200, 6971135 squaresBoss Encounter, Zamorak's RampartSurface 3104, 7072190 squaresBoss Encounter, Seren's EncampmentSurface 3291, 6885192 squaresOther destinationsBoss Encounter, The HeartSurface 3200, 6971135 squaresBoss Encounter, Zamorak's RampartSurface 3104, 7072190 squaresBoss Encounter, Seren's EncampmentSurface 3291, 6885192 squaresBoss Encounter, Sliske's NecropolisSurface 3301, 7076280 squares