5. United Arab Emirates
Oil reserves: 97.8 billion barrels
Of the 11 largest oil reserves by country in the world in 2019, if there was ever a country to take advantage of the presence of oil within its borders, it is the United Arab Emirates. The country was mostly a desert, and its jewel, Dubai, is now one of the most visited places in the world thanks to money from oil transforming the desert into a glitzy city.