4 Best Hotels in Side Trips from Buenos Aires, Argentina

Thick vegetation surrounds the tomato-red 19th-century country house that's the center of the eco-action at Bonanza. The idea behind the establishment is to share the natural wonders of the area with visitors through organized walks, kayak expeditions, and horseback rides. Ten-foot ceilings, rustic furniture, and nothing but green outside the huge windows are among the simple pleasures. Hearty barbecues (meat or a veggie option) and drawn-out mateadas (mate tea and cake) are also highlights. The day package includes two guided activities, lunch and use of the facilities.

Six spacious, individually themed cabañas allow you to unwind at your own pace. Breakfast is served in the main cabin, but there's no restaurant here—though water taxi service can be arranged to get to one and back—so guests can bring their own food to prepare meals in their cabin's kitchenette or outdoor grill. Swim or laze in the river or swimming pool, kayaks and canoes are available, and the main building has a foosball and pool table. Everything is connected by boardwalks that wind through the lushly green property.

You'll get a warm welcome at this rootsy B&B, which is surrounded by a lush garden. The 10 air-conditioned rooms and two cabañas open onto a shady veranda where you can enjoy your breakfast; from there it's a couple more steps to the pool. Pine paneling gives the simply furnished rooms a country vibe.

Dense tropical vegetation overhangs the wooden walkway that leads to this tiny guesthouse's three rooms, tucked away in a pale-blue clapboard house. They're not fancy, but the wood and wicker furniture and brightly painted paneling are cheerful and welcoming. So is owner John Fernandes, who's full of information and advice about Iguazú, which he shares with you over high-octane caipirinhas at the nightly cocktail sessions.