"Visiting Angkor isn't only about religion and temples. There's nature and cosmology, too," independent tour guide Sieb Chong, also known as David, says, pointing to a family of three gibbons swinging ...

This case study on Angkor represents some of the key threats and concerns World Heritage sites across the world may also have to deal with and manage. When Angkor was first inscribed in 1992, it was ...

How big were the world's ancient cities? At its height, the world's first city of Uruk may have had about 40,000 people about 5,000 years ago. In the medieval period, London may have had a population ...