Even if you haven't climbed Cerro Aconcagua, these tranquil baths, ranging from 30° to 40° C, connected to the Hotel Cacheuta, are just what the doctor ordered. Guests lounge around decadently in bathrobes, moving between varying pools with gorgeous mountain views. An elegant full-length pool sits above on a manicured lawn. Day use includes a gut-busting, delicious buffet lunch.

Therapeutic mud is available to be slathered on and a variety of spa treatments are offered, including massages (30 minutes/one hour AR$400/800) and 'water therapy', where you're gently moved around in a pool while wearing wrist and ankle floaties – it's meant to evoke one's long ago days in the womb.