If you thought carving presidents' heads into a mountainside was impressive, you'll be blown away by this rock-cut temple complex near Aurangabad in central India. There are 34 temples and monasteries in all, including the world's largest monolithic building. Each was carved top to bottom from the rock, largely between the 6th and 10th centuries. But more than just a magnificent spectacle, these shrines are a unique exemplar of ancient India's religious harmony. Shrines to Buddhism, Hinduism and Jainism all snuggle side by side and even appear to borrow inspiration from one another.