Boat excursions from Bariloche (Puerto Panuelo) to Bosque Arrayanes (about AR$160) & Puerto Blest, they also do the trip across to Chile (Cruce de Lagos) (about US$230).
Museum of Patagonia
"Stuffed" native wildlife, pictures, and a great section covering the indigenous pre-Hispanic inhabitants of the region.
In the early 1950s, an Austrian scientist named Ronald Richter attempted to build the world's first fusion power plant on an island in a lake in the Andes, the undertaking being known as the Huemul Project. A couple of years and an equivalent of several hundred million US dollars later it came into light that Richter never had got any proof of his design actually functioning in the first place. As the patron of the project, President Juan Perón, was ousted in 1955, Richter was arrested for fraud. Today the ruins of the project can be visited on the island, and the city itself remains a center of Argentinian nuclear research.
Skiing
It has the biggest ski centre in South America, with a skiable area of 2 km² (0.77 sq mi), over 100 km (62 miles) of ski runs, and a lift capacity of 22,200 skiers per hour. It is located 19 km (12 miles) from Bariloche. If you enjoy hiking, there is trail to the Frey refugio which takes about 6½ hours (4 up, 2½ down). Look for the trailhead in the far corner of the parking lot.
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.
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.