There is an entire submerged world hidden just below sea level, largely out of sight to terrestrial beings today. The Earth’s shores are lined with sunken cities, flooded crypts, drowned forests, and submerged structures that have been lost underwater over the millennia, overtaken by nature or human development.

Rising sea levels and flooding caused by earthquakes, landslides, changing tides, melting glaciers, or manmade dams have wiped entire villages off the map. And sometimes, when the water recedes, these submerged cities and landscapes reemerge from the depths, an eerie glimpse at the invisible sunken world.