Levitheas

The tideborn, due to their very common mutation that allows them to breathe underwater, have done the next logical thing and began building their cities in the ocean. This prevents enemies to enter easily, while still allowing for visitors with special precautions taken. Because the deeper areas of the ocean are quite dark, they use many lights to brighten up their streets, but keep it rather simple and practical otherwise. They also tend to not build very high, except for special watchtowers, embracing the safety of lower waters.