evidence: There are 17 countries without rivers running within them. [...] The largest country without a river is Saudi Arabia with a land area of 830,000 sq. miles (2,149,690 sq km) of which 95% is desert. The average temperature in the summer months hovers around 113°F (45°C), and many parts of the country have not received any rainfall for several years. All water collected is stored in underground aquifers. Saudi Arabia meets its drinking water requirements from the following sources: [...] The list of countries without rivers: