Andaman & Nicobar Islands
View the underwater coral world without getting wet — glass-bottom boats at North Bay Island (near Port Blair) and Elephant Beach allow visitors to see colourful reef fish, sea anemones, sea turtles, and living coral through glass panels in the boat's floor.
Best done on calm, sunny mornings when water visibility is highest. North Bay Island (30 min by speedboat from Port Blair) also has excellent water sports facilities.