The literal translation from Khmer is Great City. Angkor Thom was not only the last, but the most enduring capital city of the Khmer empire. The pattern on the stone is caused by hundreds of years in a tropical, Cambodian climate. Even still you can make out the faces on the four sides of this tower above the entrance to the city. To give an idea of scale it is possible to drive a coach through the opening at the bottom of this frame, although obviously this photograph just shows the top half. It is one of the most impressive sites in the Angkor National Park, especially when you consider it was built around 750 years ago.