| gptkbp:instanceOf | gptkb:wetlands 
 | 
                        
                            
                                | gptkbp:area | approximately 1,500 square miles 
 | 
                        
                            
                                | gptkbp:drainedBy | gptkb:Ouse_River gptkb:Welland_River
 Nene River
 Witham River
 
 | 
                        
                            
                                | gptkbp:ecosystem | gptkb:bay gptkb:marina
 gptkb:fire
 
 | 
                        
                            
                                | gptkbp:highestPoint | gptkb:Holme_Fen 
 | 
                        
                            
                                | gptkbp:historicalEvent | drainage began in 17th century 
 | 
                        
                            
                                | gptkbp:historicalName | gptkb:The_Bedford_Level The Great Level
 
 | 
                        
                            
                                | gptkbp:historicalSignificance | gptkb:Cornelius_Vermuyden 
 | 
                        
                            
                                | gptkbp:locatedIn | gptkb:Cambridgeshire gptkb:East_Anglia
 gptkb:England
 gptkb:Lincolnshire
 gptkb:Norfolk
 gptkb:Suffolk
 
 | 
                        
                            
                                | gptkbp:lowestPoint | gptkb:Holme_Fen 
 | 
                        
                            
                                | gptkbp:lowestPointBelowSeaLevel | 2.75 metres 
 | 
                        
                            
                                | gptkbp:mainCrops | gptkb:wheat potatoes
 flowers
 vegetables
 barley
 sugar beet
 
 | 
                        
                            
                                | gptkbp:mainTowns | gptkb:Boston gptkb:Ely
 gptkb:King's_Lynn
 gptkb:March
 gptkb:Spalding
 gptkb:Wisbech
 
 | 
                        
                            
                                | gptkbp:notableBuilding | gptkb:Boston_Stump gptkb:Ely_Cathedral
 gptkb:Ouse_Washes
 gptkb:Denver_Sluice
 
 | 
                        
                            
                                | gptkbp:notableFauna | gptkb:lake gptkb:butterfly
 gptkb:reed_warbler
 water vole
 bittern
 marsh harrier
 
 | 
                        
                            
                                | gptkbp:notableFor | agriculture flood risk
 low-lying land
 peat soils
 polders
 unique landscape
 drainage and land reclamation
 windpumps
 network of drainage ditches
 
 | 
                        
                            
                                | gptkbp:protectedArea | gptkb:Wicken_Fen gptkb:Woodwalton_Fen
 gptkb:Holme_Fen
 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:St_Bega's_Isle 
 | 
                        
                            
                                | gptkbp:bfsLayer | 8 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Fens, England 
 |