We follow the Spanish explorer Ponce de Leon, in his quest to find the fountain of youth A 17th century engraving of the Spanish explorer Juan Ponce de Leon. Image Credit: Wikimedia Commons Would you travel the world to find the mythical fountain of youth that is capable of preserving life forever? Click start to play today’s Crossword, where your challenge is to name all the famous explorers. Adventurous travellers have searched high and wide for the fabled fountain. In the fourth century BC, Alexander the Great, one of the world’s most successful conquerors, supposedly came across a river that ‘healed’ the damage of age. In the 12th century AD, a mythical European king named Prester John supposedly ruled a land with a fountain of youth and rivers of gold. There were similar accounts from around the world, in locations such as Japan, England, and the Canary Islands, according to history.com.