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Photo: Martín Gaitán, CC BY-SA 4.0 via Wikimedia Commons
All-day tour by bus to see the seven picturesque lakes between Bariloche and San Martín de Los Andes, with lunch at SMdLA, followed by a return trip through the arid Pampas where you can see much of the local fauna along the way.
The Road of the Seven Lakes is the popular name given to the scenic portion of national route 40 between the towns of San Martín de los Andes and Villa La Angostura in the Neuquén Province, in Patagonia Argentina.
© OpenStreetMap contributors
A forest of rare, orange-colored trees that only grow on a local island (and one in Japan) near Villa la Angostura. There are several cruise boats; the newest (luxurious) ship is called the "Cau Cau". Take the circuit bus out of Bariloche and catch a boat (near the Hotel Llao Llao) and have lunch, hike or bike, and enjoy the afternoon in the forest.
Nice 3 km hike starting close to the Lao Lao golf course. Beautiful views to Lago Moreno.
This beautiful 25-km route can be biked or hiked. You can also do it by bus during summer (line 10). If you hike it, take bus 20 towards Llao Llao till "El Muelle". See map above for track.
Beautiful view of the lakes and mountains around—hike it (30 min, departs near the bottom of the lift) or take the ski-lift (AR$8000, ~USD$8). Get in with bus #20, 21, 10 from the center and get off at km 17.8. After the Campanario you can go on with the Circuito Chico during the same day.
In late spring/summer/early autumn there's a trekking trail to the mountain shelter (not as easy as Otto's). It takes about 3 hours to get there and can be quite tiring, but the views from the shelter are impressive. Be sure to bring along water and some fruit to keep your energy. Colonia Suiza, a Swiss-like borough, is nearby.