1) Megalithic monument 
Senâm is the name of a long, low hill situated in the M`sila Province, south-west of Algiers .The hill is covered with a large number of stone circles. These stone circles are built of natural limestone, with standing slabs two to three feet high. The diameter of the circles varies between about 23 feet (± 7 meter) to 34 feet (± 10 meter). The....