Iwagakure

Iwagakure no sato (岩隠れの里), Village Hidden Among Rocks, is located in the Land of Earth. As one of the five great ninja villages, Iwagakure has a Kage as it's leader known as the Tsuchikage. Ninja from this village seem to specialize in earth-based jutsu. Deidara comes from this village. In the past, the village was at war with Konohagakure, part of which is seen in the Kakashi Gaiden arc. A large number of their ninja were slain by the Fourth Hokage, so they are not allies of Konoha.