RAF Lakenheath is a 111 hectare biological Site of Special Scientific Interest covering parts of RAF Lakenheath Royal Air Force base, east of Lakenheath in Suffolk.[1][2] It is in the Breckland Special Area of Conservation.[3][4] 
This grassland site on well-drained sandy soils has more rare plants than any other site in the county, including perennial knawel, Breckland thyme, wild grape hyacinth, sand catchfly, drooping brome and smooth rupturewort. There are also 22 nationally rare and 47 nationally scarce invertebrates.[5] 
The site is private land with no public access. 
 References
  52°25′N 0°34′E / 52.41°N 0.56°E / 52.41; 0.56 
 |  | 
|---|
| Biological |  Abbey Wood, FlixtonAlde–Ore EstuaryArger FenBangrove Wood, IxworthBarking WoodsBarnby Broad and MarshesBarnham HeathBerner's HeathBixley HeathBlack Ditches, CavenhamBlaxhall HeathBlo' Norton and Thelnetham FensBradfield WoodsBreckland FarmlandBreckland ForestBrent Eleigh WoodsBugg's Hole Fen, ThelnethamBurgate WoodCavendish WoodsCavenham–Icklingham HeathsCherry Hill and The Gallops, Barton MillsChippenhall GreenCombs WoodCornard MereCrag Pit, SuttonCransford MeadowDeadman's Grave, IcklinghamDeben EstuaryDew's PondsEdwardstone WoodsElmsett Park WoodEriswell Low WarrenFakenham Wood and Sapiston Great GroveFox Fritillary MeadowFoxhole HeathFreston and Cutler's Woods with Holbrook ParkFrithy and Chadacre WoodsThe Gardens, Great AshfieldGipping Great WoodGlemsford PitsThe Glen Chalk Caves, Bury St EdmundsGosbeck WoodGromford MeadowGroton WoodGypsy Camp Meadows, ThrandestonHay Wood, WhepsteadHorringer Court CavesHigh House Meadows, MonewdenHintlesham WoodsHopton FenHow Hill TrackIken WoodIpswich HeathsKentwell WoodsKnettishall HeathLackford LakesLakenheath Poor's FenLakenheath WarrenLandguard CommonLaurel Farm MeadowLeiston - AldeburghLineage Wood & Railway Track, Long MelfordLingwood MeadowsLittle Blakenham PitLittle Heath, BarnhamLondon Road Industrial Estate, BrandonLordswell FieldMaidscross HillMajor Farm MeadowMetfield MeadowMickfield MeadowMiddle Wood, OfftonMilden ThicksMinsmere–Walberswick Heaths and MarshesMoat Farm MeadowsMonewden MeadowsNacton MeadowsNewbourne SpringsNewmarket HeathNorton WoodOrwell EstuaryOver and Lawn WoodsPakefield to Easton BaventsPakenham MeadowsPashford Poor's Fen, LakenheathPotton Hall Fields, WestletonRedgrave and Lopham FensRex Graham ReserveRiverside House MeadowSandlings ForestSinks Valley, KesgraveSizewell MarshesSnape WarrenSotterley ParkSprat's Water and Marshes, Carlton ColvilleStallode Wash, LakenheathStanton WoodsStaverton Park and The Thicks, WantisdenStour EstuarySutton and Hollesley HeathsThetford HeathsThorpe Morieux WoodsTitsal Wood, ShadingfieldTrundley and Wadgell's Wood, Great ThurlowTunstall CommonWangford Warren and CarrWeather and Horn Heaths, EriswellWest Stow HeathWesthall Wood and MeadowWeston FenWilde Street MeadowWortham Ling
 | 
|---|
| Geological |  Alde-Ore EstuaryAldeburgh Brick PitAldeburgh Hall PitBawdsey CliffBobbitshole, BelsteadBreckland ForestBuckanay Farm Pit, AldertonChillesford Church PitCorton CliffsCrag Farm Pit, SudbourneCrag Pit, AldeburghCreeting St Mary PitsFerry Cliff, SuttonFlixton QuarryGedgrave Hall PitGreat Blakenham PitHascot Hill PitHolton PitHoxne Brick PitNeutral Farm Pit, ButleyPakefield to Easton BaventsRamsholt CliffRed House Farm PitRed Lodge HeathRichmond Farm Pit, GedgraveRockhall Wood Pit, SuttonRound Hill Pit, AldeburghSandy Lane Pit, BarhamStoke Tunnel Cutting, IpswichStour EstuarySudbourne Park PitValley Farm Pit, SudbourneWaldringfield Pit
 | 
|---|