Arenas del Mar Beachfront & Rainforest Resort

This neighborhood is replete with upscale hotels, but none is closer to the beach than Arenas del Mar, a five-star, 11-acre property within walking distance of Manuel Antonio National Park. Rooms here are equipped with spacious balconies, the rain-forest hiking trails are extensive, and the entire place is carbon neutral: solar power heats the water, and electric carts carry guests around the resort. Organic bath products are a thoughtful flourish.