Discovery and exploration (1) Description and travel (1) Restrooms (1) Chinese language--Simplified characters (1) Travel (1) Toilets (1) Speleology (1) Souterrains (1) Rivers (1) Physics (1) Lakes (1) Karst (1) Hydrology, Karst (1) Climatology (1) Climate (1) Chinese characters (1) Chinese (1) Caves (1) Cave dwellings (1) Books (1) Basements (1) Technique (1) Alternative mass media (1) Science (1) Geography (1) Counterculture (1) Caracteres chinos (1) Ciencias (1) Lagos (1) Descubrimientos geográficos (1)