El Dorado Treasure is a legendary lost city of gold that has been sought after by many explorers and adventurers for centuries. The term El Dorado translates to 'the golden one' in Spanish, and the treasure is believed to be located somewhere in South America. The crossword solution for El Dorado Treasure is ORO, which is the Spanish word for gold. This term is fitting for the legendary lost city of gold, as it symbolizes the wealth and riches that are believed to be hidden within.