Here a few photos taken by us at PN Nahuel Huapi, which is just across the border from Chile. From there it is reached most easily from Osorno. In Argentina the nearest city is San Carlos de Bariloche. This park connects to two Chilean parks: PN Puyehue and PN Vicente Perez Rosales.
Lago Espejo, just across the border from Chile
Lago Nahuel Huapi, near San Carlos de Bariloche, Argentina
Photo impressions from Chile can be found here.