Caála is a town and a municipality located 23 km west of the city of Huambo, in the namesake province in Angola. It was known as Vila …Caála is a town and a municipality located 23 km west of the city of Huambo, in the namesake province in Angola. It was known as Vila Robert Williams while Angola was a Portuguese colony, after the railroad developer and mining magnate Sir Robert Williams. The town has a population of 130,000 and the municipality a population of 279,792 according to the 2014 census.