3. Mahe, Seychelles
With its golden sandy beaches, crystal-clear waters and lush palm forests, Mahe presents the epitome of a tropical paradise. The region is also home to the enormous whale shark. Growing up to 40 feet, the whale shark is the largest of all fish species. Despite its formidable size, it is a docile creature that poses no threat to humans. Sometimes, divers can even hitch a lift on their backs. Whale shark encounters are one of the most coveted sightings scuba divers have on their wishlists.