The personal residence of the Kazahana family, the castle was partially burned when Dotou overthrew his older brother Sousetsu. It is said that it is rebuilt.
Hidden Snow was a fledgling village. With Daimyo Kazahana Dotou's desire for power, he began to hire ninja to come under the Hidden Snow banner. When Team 7 was sent to the Snow Country to protect the woman revealed to be Kazahana Koyuki, they succeeded in overthrowing Dotou and assuring Koyuki's rise to country head. Because of Koyuki's good ties with Konoha, it is unknown if she will feel the need to maintain a shinobi village.
The Rainbow Glaciers had experienced the same frigid temperatures that marked the country. Sousetsu chose this location to build his heating generator. When the generator was finally activated, the ice and snow in the valley melted, and it could finally live up to its name.