While Soest is mostly defined by its forests and dunes, water plays a vital role in its geography to the north and east.
* **The River Eem:** Soest borders this tranquil river, which is notable for being the longest river in the Netherlands that both originates and empties within the country's borders. The Eem provides opportunities for recreational boating, rowing, and scenic cycling along its dikes. * **Eemland Polder:** Stretching out from the river is the Eemland, a vast, flat expanse of peat meadow landscapes. It is a critical habitat for meadow birds (weidevogels) such as the black-tailed godwit (grutto) and the lapwing (kievit). * **Small Lakes:** Minor recreational ponds and natural water features dot the estates and forested areas surrounding the town.
