Kuwait

 The capital is Kuwait city.

They were part of the gulf war, so there is a lot of oil, and there is the residue of the war located in destroyed oil fields that solidified to tar, and lots of industrial pipelines and refinery buildings from the gulf wars. 

Kuwait in the 1950s was one of the first countries to use desalination plants as its main form of water.

Summers in Kuwait are very hot and it is possible for Kuwait to get to over 50 degrees celsius.

Other than oil, Kuwait was known for its very expensive and sought-after wild oyster pearls, but in 1916 Japan cultivated their own pearls for a bigger world population and that kinda stopped the whole pearl thing with Kuwait (but they still had oil.)

4.2 Million population.

The Kuwaiti dinar is their currency, and it is the highest-valued currency in the world.