Spiti (locally pronounced 'Piti') or the 'middle country', has its sub divisional headquarters at Kaza. The river Spiti originates at the base of the Kunzam range and flows eastward to join the Sutlej at Khab in Kinnaur. In practical isolation for centuries, Spiti has an intensely introvertive culture centred around its several monasteries- Dhankar, Ki, Tabo, Mud, Gungri, Lidang, Hikim, Sagnam, Mane Gogma and Giu to name a few. Spiti was loosely ruled for many centuries by a hereditary wazir, styled Nono. The majority of the people are Buddhists, followers of the Geluk-pa sect. The repetition of the mantra "Om mani padme hum" (literally, 'Behold, the jewel is in the lotus'), is constant; it is believed to bring good fortune and wash away all sins. For all the seeming bleakness, Spiti possesses a haunting beauty. The wildlife in the region includes the elusive snow leopard and ibex, found in the Pin valley.

Spiti has come to be known as the "fossil park of the world". The three villages Kibber, Kaza & Kye fall on the route faovourite among those looking for fossils. These villages are situated at heights between 13,500 ft. and 14,400 ft. above msl. Langza is famous for fossils of maritime life. These fossils are found on either side of Kang-yur and Paapen-yu nullahs near the village.