Municipality of Biscay, placed in the part Center - south of the province. The river Indusi waters his term with his such tributaries like the creeks of Indiriti, Urrenieta and of Lo Sal and the creek of Montebideo, of Iraurgi, which pays his waters to the river Urkiola. His capital the porch Ugarana is N. O. of municipal term in the right shore of the river Indusi. In general it is a mountainous area, with good forests and grasslands, ranging his heights between 1.009 (Mugerra) and 200 m.

Dima is a Town spread with soft hillsides. A locality is of a rural environment which population concentrates on the quarters of Aroztegieta, Bargondia, Artaun, Indusi, Biteriño, Lamindao, Oba, Olazabal and Bikarregi. In spite of this distribution dispersed hamlets exist also . In Ugarana, where the town hall is and the parochial church.

There nature finds the cave of Balzola, real work of , with beautiful stalactites formations and stalagmites. The stalactites are alike human forms, animals, geometric forms and diverse objects. The space has one mystery aura. For the way we will see the Jentilzubi bridge, one natural arch worked by the water. (fte. to see the links)

Nuclei of Dima: Ugarana, Olazábal, Bikarregi, Indusi, Arostegieta, Lamindao, Oba, Bargondia, Intxaurbizkar