Tanimagakure

Tanimagakure (lit. Village Hidden in the Chasm) is a completely independent ninja village; despite having been separated from the rest of the world for centuries, Tanimagakure has prospered marvelously. Tanimagakure is located in the upper-left corner of the Land of Earth, right in between two extremely tall mountain ranges' summits. Since it's in a black-as-pitch ravine, the villagers have learned to adapt to the constant darkness. Each villager has a certain occupation to help maintain the balance of light, water, etc, using their chakra type. Water types would take plumbing, electrical types would take electricity, etc. There's a river that flows directly from the right mountain's summit down to the middle of the village, straight through it, and up the other mountain. (This was of course made to do so by the plumbers.)