Ruins of the Mayan city of Palenque in Yucatan, Southern Mexico
One of the most important elements for any civilisation, modern or ancient, is a clean and reliable water supply. This is why most early human settlements were beside waterbodies such as lakes and rivers. Later on, people learnt to control their environment so they were no longer limited by such natural water supplies. A well-known example is the Roman aquaducts that supplied piped water to residences, eliminating the need to transport water in containers from place to place.