Considering the Aconcagua in Mendoza?
A VT member wrote the following comment about visiting Mendoza:
Cruz de Paramillo - viewpoint for the Cordillera by Trekki
Along the "circulo" around Mendoza, one of the highlights is definitely Cruz de Paramillo, a 3000 m high viewpoint for the magnificent Cordillera.
Not only that you can see the multicolor effects of this great mountain range, but you also see all these 4000-5000-6000 m high peaks - with Aconcagua being the highest there, 6959 m.On the left, a bit in the clouds is Aconcagua