Khajuraho Temples, India
According to one theory, the erotic carvings on the Khajuraho temple complex in central India were created to prevent the rain god Indra from accidentally striking the holy place with lightning. Indra was a keen voyeur and would have baulked at damaging such a source of pleasure. These days the rain god isn't the only one to enjoy a peek at what goes on behind closed doors; hundreds of thousands of visitors flock to Khajuraho each year to see the exquisite adults-only carvings adorning the village's temples.
The most frequently asked question by visitors is, why all the sex? If the explanation about Indra the rain god isn't enough to satisfy you, there's the less enchanting story that the carvings served as a kind of how-to-do-it manual for Brahmin boys growing up in segregated schools. Rather more convincing is the theory that these are Tantric images depicting the gratification of baser instincts as a way to blot out the evils of the world and achieve final deliverance. Or you could just look at the sculptures unhampered by modern morality and consider the carvings to be a joyous celebration of the possibilities of life.