Is your bathroom small, dark and smelly, and a place where you spend as little time as possible? Consider surrounding yourself in nature with an open-air or partially open-air bathroom. They’re ideal in tropical climates, because odors and moisture are rapidly vented away. Open-air bathrooms are often used in luxury resorts and eco resorts so patrons can be close to nature. Using natural materials such as stone, pebbles, coral, pottery, wood and plants creates a unique environment with inviting ambience. Scented flowers are a wonderful touch. You can build extremely beautiful bathrooms like the ones shown here at very low cost by using locally available natural materials and doing the work yourself.
Image source: 2 Costa Rica Travel
Image source: Kecuk.com (more good pics)
Image source: Apartment Therapy.com
Image source: Traveller Inspire
Image source: Sun n Sand Vacation.com
Image source: Wanderlust
Many more images at Google Images