You'll need to book a day trip with an agency We used Warpa Picchu Eco-Aventura (Portal Independencia 66). The tour was good but the guide Pierre from Belgium was a bit tiring after a while.
The visit to the ruins is usually combined with a look at the Quinua flat where a battle sealed the independence of Peru and a top in the village of Quinua.
The ruins are not the most impressive, there is still a lot to dig but you can see a big multi-chambered Huari tomb.
Do buy fresh prickly pears from the woman outside the entrance, they are sooo good.
Then on to the flats with the obelisk memorial. Nice view & freshly cooked food from stalls. The meat looked unappetising but the gloopy green stuff served with potatoes was very tasty!
In Quinua village, look at the roofs: they all have a little clay church on top to protect the occupants. Stock up on clay figurines that you will see all around Peru for three times the price. They make great gifts. If you have the space, buy a clay church for your own roof.
El Obelisco y la Pampa de Quinua. Deben ser visitados, mas q nada por la significancia historica de este lugar para la independencia no solo peruana pero sudamericana de Espana. Desde el Obelisco, creado para recordar a los caidos en la batalla de Ayacucho, se puede admirar la pampa y en su vastidad uno puede solo tratar de imaginar el derroche de sangre q hubo alli. Cada 9 de diciembre, para el aniversario de la Batalla, la ciudad se viste de gala y celebra en grande la victoria.