Sunken cities

Humans need water to survive, and so access to this precious natural resource has been an important factor in deciding where we have made our homes throughout history. Building near rivers, lakes and springs gave early settlements access to clean water for domestic and agricultural use, and the availability of fish was a reliable food source. Travelling by boat also became an easy way to navigate the land more quickly, allowing our species to migrate to new areas. As humans spread across continents and populations boomed, trade between civilisations became more frequent. Coastal settlements allowed for