Peru is South America at its most spectacular — a land of soaring Andes, Amazon jungle, desert coast and the lost cities of the Incas, wrapped in a living indigenous culture and one of the world's great cuisines. Cusco, the ancient Inca capital high in the mountains, is the beating heart of it: a gorgeous colonial city built on Inca stone, full of cobbled lanes, golden churches and markets, and the launch pad for Machu Picchu and the Sacred Valley. Breathtaking, in every sense.
What things cost: Peru is very good value — a hearty menú del día costs a couple of euros and markets and street food are cheap, though the Machu Picchu trip (train, ticket, guide) is a significant, unavoidable expense. Cusco sits at 3,400m, so take the altitude slowly for a day or two. When a zone below says 'low', that means very low.