The island of Utila is the cheapest place on the planet to take the Open Water, Advanced or Dive Master courses. With increbiles prices (170 euros for all open water courses), the cheap prices do not mean that the quality of teaching suffers. Most of the diving sites here are very professional, with good safety measures and spectacular scenery. The reef that runs from Belize to here is the second largest in the world after Australia. You can see real forests under the sea and catch amazing glimpses of wildlife like the whale shark. A tip: you do not go in the rainy season, where the water is a bit murky.