The casino is set into the hill slope such that the main entrance on the north side is at a level above the giardino segreto or ‘secret garden’ enclosure on its south side, a parterre garden with low clipped hedges. The gardens on the sloping site were laid out from around 1650 by Innocent's nephew, Camillo Pamphili, formalizing the slope as a sequence from the parterres that flank the Casino, to a lower level below, framed by the "boschi" or formalized woodlands that rose above clipped hedges, and eventually arriving at a rusticated grotto in the form of an exedra, from which sculptured figures emerge from the rockwork. The exedra, now grassed, formerly enframed a 'Fountain of Venus' by Algardi, which is preserved in the "Villa Vecchia", together with Algardi's bas-reliefs of putti representing Love and the Arts that were formerly here. The fountain spilled into a small cascade that let into a short length of formal canal, which was intended to remind the viewer of the similar "Canopus" at Hadrian's Villa— another programmatic connection of the Pamphili with Antiquity.