Lake Lugu, in China’s Northern Yunan Province; home of the aboriginal Mosuo tribe, the last purely matriarchal people left in China. The Mosuo are best known for their practice of walking marriage, a form of poly-amoury in which the women – masters of the household – chose their lovers for the evening from among the men of the tribe. Children are raised semi-communally, taking the mother’s name and living in the mother’s home.