Yet while many andenes were abandoned or fell into disrepair, they never disappeared completely. Drawing on knowledge passed down over the generations, many Andean farmers continue to use them today, and though often overlooked by travellers, they remain a common sight in places such as Isla del Sol and the wider Titicaca region, the Sacred Valley near Machu Picchu, and the Colca Canyon in southern Peru, a fissure twice the depth of the Grand Canyon.