Zegama's main characteristic is its natural location as the last Gipuzkoan toun up the valley o river Oria, vera close tae the Aizkorri Natural Pairk, in which the heichest mountain in the Basque Autonomous Commonty can be foond, the popular Aizkorri summit (1,528 m), locatit at the same name muntain range touerin ower the whole aurie. The Oria river, the langest ane in the province o Gipuzkoa, rises in several springs an their correspondin streams flowin doun the dramatic slopes o the valley that merge in a main stream afore the nucleus o the toun. The soothren Otzaurte hamlet (IPA: /o'tsaurte/) staunds on the dividin line o the watters runnin ontae the Mediterranean wattershed an those flowin north tae the Atlantic throu the Oria river.