Abu Dhabi is situated on a peninsula that lies in the middle of the Persian Gulf coastline. Persian Gulf was the best location for pearls. Therefore, Abu Dhabi worked in the pearl business and traded with others. Abu Dhabi is a metropolis and one of the most expensive city in the world. It has experienced rapid development and urbanization, combined with the relatively high average income of its population. No wonder you will see many high-rise buildings or skyscrapers.