Peru
Eat well and like a local by buying a tamale (a kind of steamed dumpling wrapped in a corn husk - it's nicer than it sounds!) They are really cheap, real Peruvian street food available as either sweet (with a raisin in the bottom) or savoury (with meat).
There is usually a lady selling tamales under the porch outside the shops to the left when looking at the cathedral. There is usually a small crowd hanging around. She's sometimes only around in the morning though
Helps a lot with the altitude, is available free in most hotels, and tastes pretty good too. Hardcore travellers will want to chew the coca leaves, as the locals do, but the tea is more palatable and leaves you with a more attractive smile.
Wherever there's hot water
Cuzco can be cold in the evenings. But fear not, locals have come up with a cure. A hot glass of creamy Ponche de Leche with Pisco warms the parts other drinks cannot reach.
Perhaps the best place to enjoy this speciality is in the eccentric little place on the Plaza de Armas, alongside the Cathedral. Pretty much all they serve are Ponches de Leche, pastries, and some left-wing politics in the shape of huge Soviet posters.
A great place to warm up, wind down, and actually experience a bit of authentic Cuzco.
Many places, but Plaza de Armas is best
Search Been there