In 1995s colossal blockbuster failure 'Waterworld' starring Kevin Costner, a world is illustrated set in the future where the polar ice caps had melted and most of the Earth is underwater. A mutated mariner fights starvation and outlaws 'smokers,' and reluctantly helps a woman and a young girl try to find dry land. Water is the most important resource on the planet. Rivers provide a steady supply of drinking water and fertilize the land for growing crops. Moreover, goods and people can be transported over water systems, and the people on land can catch fish in the rivers. According to ecological research, a world like that depicted in Waterworld could become our reality. However if youre worried that this feature is a green campaign, dont panic. We just went in search of some 'Waterworld' cities that are excellent for traveling. From a fisherman village in Nan through a floating market in Amphawa, Chao Phraya River of Bangkok, Tonle Sap in Cambodia, Inle Lake in Myanmar to the city of Venice, Italy.