Wikipedia
Motillas
The motillas were the early settlements of La Mancha ( Spain) belonging to the Middle Bronze Age, and connected to the Bronze of Levante culture. These were human-made hills atop of which are placed fortified settlements. Their height is usually between four and five meters and the motillas are separated from each other by a distance of four or five kilometers. Their construction started c. 2200 BC and they were used for about 1000 years.