Alta Gracia is a city in Argentina in Córdoba Province.
North towards Cordoba, Carlos Paz
Walk out of town to the roundabout on the Ruta C45. Wait there till someone takes you past Falda del Carmen towards Córdoba Ciudad. If you go left instead of right on the Falda del Carmen junction, you'll hitchhike towards the astronomical observatory Bosque Alegre through an amazing mountain route with epic views. It's a bit rocky, but one can camp along this road.
Other useful info
There's an Ernesto "Che" Guevara museum here, you know, the man from the T-shirts. He also hitchhiked a lot.