Grillo Tres Puntas Ecohostel was constructed (mainly by volunteers) from natural materials such as bamboo and cane. Everything here, including water, is recycled. Breezy, rustic cabins with balconies and hammocks sit on the beach and campsites have a shade roof. It's supremely rustic and not for every type of traveler, but if you value location over luxury it's pretty idyllic.
There is an artistic elevated patio fashioned from driftwood – great for sunset beers. Cheaper rooms share interesting outdoor communal bathrooms covered in mosaic tiles and seashells. Hikes to nearby mud baths can be arranged and it also runs popular tours that take in mangroves and nature reserves.