Angkor – which means city – was once the seat of the Khmer Empire from the 9th to the 15th century. It is spread over an incredible 60 miles, comprised of over 1,000 stone temples. Angkor Wat is the most striking. Built in the early 12th century, it’s the largest religious monument in the world today. The temple emulates Mount Meru, the sacred centre of the universe in Hindu mythology, while the surrounding moat symbolizes the oceans.