Arguably Argentina’s most famous hotel, Llao Llao sits on a bluff overlooking Lago Moreno. It has everything you'd expect it to have: beautifully appointed rooms, attentive service and lots of wonderful extras, such as the heated infinity pool, terrific dining and outdoor equipment (mountain bikes, skis) for any time of year. It's very popular with honeymooners.
Even if you don’t plan to spend a night in Hotel Llao Llao, take a stroll around the grounds. It was once featured on the one-peso banknote, when such a thing existed.