People have been temporarily living on oil platforms ever since they were created, in the early 20th century, but Neft Dashlari, a giant oil platform complex in the Caspian Sea, roughly 40 miles east of Baku, capital of Azerbaijan, serves as a permanent residence to around 1,000 souls. Known as the largest and oldest offshore city in the world, the Soviet-era structure was built in 1949, after engineers found vast resources of oil in the region, thousands of feet beneath the sea floor.
The original foundation consisted of pillars mounted on seven sunken ships, including Zoraster, the world’s first oil tanker. The poles were erected around a central hub, a 17,300-acre artificial island where the main oil wells were located. Between 1952 and 1958, the city grew in size to include 2,000 drilling platforms, joined by a 300-kilometer network of bridge viaducts, spread in a 30-kilometer circle.