Related by context. Frequent words. (Click for all words.) 55 limestone cave 54 peat swamps 53 Poyang Lake 53 Wollemi National 53 calcrete 53 Pluit 52 lowland forest 52 stormwater ponds 52 river catchments 52 #sqkm [002] 52 embayments 51 ponded 51 ricefields 51 graben 51 Soil erosion 51 mud volcanoes 51 Three Gorges reservoir 51 hillslope 51 drainage basins 51 heavily silted 50 andesitic 50 porous limestone 50 lush rainforest 50 sedimentary deposits 50 subglacial 50 dolerite 50 revegetated 50 dolomitic 50 bd.className + = 50 Phong Nha Ke Bang 49 embayment 49 Indus basin 49 wetland vegetation 49 seepages 49 volcanic cone 49 Arafura Sea 49 #sq km [001] 49 coastal lowlands 49 limestone bedrock 49 Yellowstone caldera 49 mangrove swamp 49 biofiltration 49 highlands 49 Yasuni National 49 Jinsha River 49 volcanic crater 49 freshwater wetland 49 Qiantang River 49 gulleys 49 alluvium 49 Sedimentation 48 escarpments 48 Ala Wai Canal 48 bioretention 48 #sq km [002] 48 volcanic lava 48 sulfur springs 48 freshwater springs 48 beaver ponds 48 Murrumbidgee River 48 heavily vegetated 48 equatorial waters 48 sparsely vegetated 48 sparse vegetation 48 basin 48 oxbows 48 heavily treed 48 riparian forest 48 tidal estuary 48 microbial mats 48 Nares Strait 48 desilted 48 Zambezi river 48 Algae blooms 48 #sq km [003] 48 Rwenzori Mountains 48 salinization 47 extinct volcanoes 47 cabbage palms 47 Kahurangi National 47 retention basin 47 Ujung Kulon National 47 alluvial deposits 47 river deltas 47 erosional 47 shrublands 47 Kalimantan Indonesia 47 landslips 47 reedbeds 47 montane 47 Sewage spills 47 Lake Lanao 47 Qinghai Tibet plateau 47 evaporation ponds 47 halite 47 Lake Alexandrina 47 pristine rainforest 47 Rillito River 47 Olifants River 47 hydrothermal activity 47 Doñana