La Casona de Odile

Five kilometers north of the center, off Av San Martín, is one of the best hostels in Argentina. Traveler-run and sitting on 2 hectares of park-like riverside land, it's got all you could possibly want – good amenities, comfy dorms and private rooms, an on-site microbrewery, yoga classes, massage, bike hire, and cheap, hearty dinners. Many come for days and stay for weeks.