The Great Blue Hole, thousands of years old. They are underwater sinkholes also called Vertical Caves. There are many different blue holes located around the world, but the best known is 'The Great Blue Hole" of BELIZE.
Combining shower and sauna is another luxurious idea. The rough-hewn granite and hefty logs here create a grounding environment in which to sit back and relax. eclectic rustic bathroom by Design Associates - Lynette Zambon, Carol Merica