12. The Ariau Amazon Towers, Brazil
The Ariau towers are a boutique hotel near Manaus, Brazil in the Rio Negro, a major tributary of the Amazon River. The hotel has 7 towers and 288 rooms elevated above the rainforest floor and connected by over 5 miles (8km) of catwalks.
The tallest of the rooms is called the Tarzan House and is located on top of a living Mahogany tree at a height of 22 meters( (72 ft.) from the ground.
The hotel has a number of tours available to its guests, most notably the Meeting of the Waters, or where the Rio Negro and the Solimones Rivers meet. Two shades of water run side by side for over 4 miles (6 km) without mixing, an incredible natural phenomenon.