Machair | NF8676 : Tràigh Hornais | on 50K, Scotland, sandy coastal grassland |
Maes | SJ1764 : Small Tumulus on Maes-mawr Farm | on 50K, Gaelic, plain, here in name |
Mains | NJ9926 : Mains of Knockhall | on 50K, Scotland, buildings of principal farm on an estate |
Maltings | NJ3963 : Portgordon Maltings | on 25,50K |
Manor | SS5346 : Chambercombe Manor, Ilfracombe | on 25,50K. Tourist site |
Manor House | TL4874 : The Burystead manor house, Wilburton, Cambs | on 25K Non-Roman |
Manorial Earthworks | TF1384 : Manorial Earthworks | Non-Roman |
Manse | NX8165 : Haugh church and former manse | on 25K |
Marble quarry | NG5820 : Skye Marble quarry | on 25K |
Marina | SS6592 : Swansea Marina | on 25,50K |
Marine Lake | SJ3197 : Marine Lake, Crosby | on 25,50K Tourist site |
Marine Training Centre | SZ1691 : Yachting Centre on the Stour | on 25K, boating, not Royal Marines |
Marine Zoo | TF5763 : Seal at the Seal Sanctuary | on 25,50K Tourist site - Natureland seal sanctuary |
Marine Station | NS1754 : Marine station on Great Cumbrae | on 25,50K |
Mark | SJ1888 : Hilbre Island lighthouse | on 25K |
Marker stone | SX6558 : Two Moors Way marker stone | on 25K |
Market | NY3827 : Troutbeck Inn | on 25K, Sheep Market |
Market Place | TF8108 : The Market Place, Swaffham in 1987 | on 10K |
Marsh | TF4763 : Irby in the Marsh: aerial 2014 | on 50K, place name, former marsh |
Martello Tower | TR2437 : Martello Tower No.1 | on 25,50K Non-Roman. |
Mast | NY1857 : Anthorn Radio Masts | on 10K |
Mausoleum | TA2727 : The Constable Mausoleum, Halsham | on 25,50K |
Mawr | SH5354 : Mynydd Mawr | on 50K, Welsh, great |
Maze | SK8902 : Turf Maze | on 25,50K Non-Roman |
Mead | TL4211 : Hunsdon Mead Nature Reserve, Roydon | on 25K, a meadow |
Meadow | SP5206 : Riverside meadows, Oxford | on 25K |
Mean High Water | TL4278 : New Bedford River | on 25K A long way inland in the fens |
Mean High Water Springs | NK0834 : Cruden Bay beach | on 25K High and Low Water in Scotland are marked for Spring tides |
Mean Low Water | SX0246 : St Austell: Pentewan Sands | on 25K |
Mean Low Water Springs | NK0834 : Cruden Bay beach | on 25K |
Measured Mile | NT8869 : Admiralty Measured Mile Marker | on 50K, nautical mile to NT9068 : "The measured mile" |
Medieval Village | TF0695 : Owersby medieval village site | (site of). on 25K Non-Roman | |
Meeting House | near NC6637 : Graveyard by Loch Naver | remains on 25K |
Memorial Cairn | NN0359 : Memorial cairn near Ballachulish, Scotland. | on 25,50K |
Mere | SD4214 : The Mere | on 50K, small lake |
Merse | NX9868 : Kirconnell Merse | on 50K, Scotland, marsh, often reclaimed estuary |
Mesolithic | NR3587 : Mesolithic shell mound, Oronsay | on 25K, Non-Roman |
Metro | NZ2162 : Metro Centre | on 50K, here in name, Metro transport lines have standard symbols and abbreviations |
Mews | TQ2480 : Arch entrance to Holland Park Mews | on 10K |
Mica Dam | SW9654 : Mica Dam near Carpalla | on 25K |
Military Range | SX3753 : Rifle Range Target at Tregantle Fort | on 10K |
Military Road | NX5756 : Old Military Road, Jenoch Wood | on 50K, Old Military Road |
Milking Parlour | SO9800 : Coates Manor Farm [5] | on 25K |
Mill | SN4141 : Pantolwen Mill | on 25. Mill may have specific meaning of grinding, or more general of manufacture, Pantolwen had both |
Mill Dam | SD9491 : Askrigg Mill | (disused) on 25K |
Mill Lade | NT5575 : Rural East Lothian : Outbuildings and Mill Lade at Sandy's Mill | on 25K; |
Mill Mound | SP7118 : Mill Mound 2 | on 25K Non-Roman |
Mill Pond | SE9481 : Brompton Ponds | on 25K Blue lettering |
Mill Pond (Tidal) | SU7405 : Floodgate, Emsworth | on 25K Blue lettering |
Mine | SX6671 : Hexworthy Mine Wheelpit | on 25K (disused) |
Mine Gallery | NM8365 : Drainage Level | on 25K |
Mineral Railway | SX1254 : The mineral railway at Golant | on 25K Words at SX118561 |
Miniature Railway | SP5172 : Rugby - Rainsbrook Valley Railway | on 25K |
Mink farm | TA3102 : Humberston Road approaching Mink Farm | on 25K |
Minster | SK7053 : Winter Sunlight on the Minster | on 25,50K |
Mire | NY7217 : The northern edge of Sandford Mire | on 25K, marsh |
Mission Hall | at NG724605 | on 25K |
Mizmaze | SU1420 : Breamore: the mizmaze | on 25,50K Non-Roman (a mizmaze is a turf maze) |
Moat | TL6857 : Moat of former hall at Kirtling | on 25,50K Non-Roman |
Moated Site | NT0503 : Garpol Water | on 25K Non-Roman |
Mobile Home Park | SU4914 : Grange Park Mobile Homes | on 25K mobile homes like bungalows |
Model village | SP1620 : Model Village, Bourton On the Water | on 50K |
Model Yacht Pond | ST3160 : Towards the Model Yacht Pond, Weston-super-Mare | on 25K |
Moel | SH8855 : Moel Rhiwlug | on 50K, Welsh, bare hill |
Moil | NG5630 : Luib na Moil | on 25K, Gaelic, shingly beach, same as Mol |
Mol | NB0000 : Mol Vatasater | on 25K, Gaelic, shingly beach |
Monastery | TL3414 : Carmelite Monastery | on 25,50K |
Monorail | SJ4170 : Chester Zoo - Monorail | on 25K |
Monument | TF8843 : The Monument to Coke of Holkham | on 25,50K |
Moor | SX6063 : Penn Moor | on 50K |
Morfa | SH5436 : Morfa Bychan | on 50K, Welsh, marsh, sea fen |
Mosque | TQ2782 : Regent's Park with Mosque in background | On 25,50K |
Moss | SD8318 : Mist over Cowpe Moss | on 25K |
Motel | TL7000 : Woodstock Motel | on 25,50K |
Motor Racing Circuit | SP6741 : Silverstone | on 25,50K Tourist site |
Motor Sports Circuit | at SP791341 | on 25K |
Motor Works | SP5504 : Cowley Motor Works | on 25,50K Motor Wks on 50K |
Motorcycle Park | SP2084 : Motocross Today, HS2 Tomorrow? | on 25K Riding circuit, not parking |
Motte & Bailey | TL7462 : Site of Denham Castle | on 25,50K Non-Roman |
Mound | SX6266 : Boundary Stone above Langcombe Head | on 25,50K Non-Roman |
Mount | NO4086 : Mount Keen from south | on 50K |
Mountain | SO2220 : Table Mountain | on 50K |
Mountain Bike Trail | NO7890 : Entrance to Durris Forest | on 50K Tourist site. Wording changed to "Cycle Trail" on maps after 2008 |
Mountain railway | SC4086 : Snaefell Mountain Railway | on 50K |
Movable Flood Barrier | TQ7484 : Barrier on Vange Creek | on 25K |
Mud and Sand | SO7012 : Ice pockets on Severn estuary | on 25,50K |
Muir | NS4279 : Auchenreoch Muir towards Nobleston Wood | on 50K, Scots, rough grazing, |
Mull | HP5504 : Blue Mull | on 50K, Scots, headland |
Mullagh | SC3986 : The summit of Mullagh Ouyr | on 50K, Manx Gaelic, ridge, peak |
Museum | SE5951 : National Railway Museum | on 50K |
Mussel Banks | SH7680 : Mussel banks | on 50K |
Mynydd | SS9689 : Mynydd Maendy | on 50K, Welsh, mountain, moorland |