The My Son Sanctuary is a structural display of Hindu tower temples developed over ten centuries. Between the 4th and 13th centuries a unique culture which owed its spiritual origins to Indian Hinduism developed on the coast of contemporary Viet Nam. This is graphically illustrated by the remains of a series of impressive tower-temples located in a dramatic site that was the religious and political capital of the Champa Kingdom for most of its existence.

Source: http://whc.unesco.org/en/list/949