Southern archaeological sites such as Shagra and Asaila are exceptions to the poor water supply in this region as they are located next to depressions .
Asaila are also two of the oldest Neolithic sites in the peninsula .
Southern archaeological sites such as Shagra and Asaila , which are also two of the oldest Neolithic sites in the peninsula , are exceptions to the poor water supply in this region as they are located next to depressions .