Zarqa is a Jordanian city and the capital of the Zarqa Governorate, which is nearly 20 km northeast of the capital city of Amman. Zarqa is the third largest city in terms of population, with a population of about 572,290 in 2013, and is considered the industrial capital of Jordan. There are many locations not to be missed in Zarqa including a wildlife reserve, a wetland reserve and several castles.