Ancient Costa Rican has been mining gold long before and makes them into artforms which could be seen at a Pre-Colombian Museum in San Jose Costa Rica.The Gold Museum opened in 1982 and currently the most notable on all Museums of Costar Rica's Central Bank. The Museum have about 1,600 gold artifact which dates from 500 to 1500 BC.
It's located in an underground complex which also included a Numismatic Museum and an exhibition space.
Know more about the Gold Museum, on a Wall Street Journal article.
Link: Museum Celebrates Costa Rica's Metallurgical Past - WSJ