Alqueva Reservoir

Alqueva Reservoir - Region of Alentejo

This picture, with views of olive trees scattered throughout the countryside and the Alqueva Reservoir, was taken from the Monsaraz castle.  With a surface area of 250 square kilometers (almost 97 square miles), this reservoir is the biggest in Europe.  It is 83 kilometers long (approximately 51 miles) and has a perimeter of 1,100 km (about 684 miles).  The main source of its water is the Guadiana River which begins in Spain.