A vast green space in the historic center of Cagliari, which preserves thousands of plant species, some very rare, from all over the world, and inside an archaeological area which houses a large number of Roman relics. The botanical garden, whose surface, similar to a trapezoid, is about five hectares, occupies the lower part of the Palabanda valley, in an area between the Roman amphitheater, the Capuchin garden and the Tigellio villa.