The city has been completely mapped and covered an area greater than 16 square kilometres (6.2 sq mi) that included about 3000 structures. The topography of the site consists of a series of parallel limestone ridges rising above swampy lowlands. The major architecture of the site is clustered upon areas of higher ground and linked by raised causeways spanning the swamps. The area around Tikal has been declared as the Tikal National Park and the preserved area covers 570 square kilometres (220 sq mi)
