An underground museum below Plaza de la Cultura. Tu-Su 10AM-4:30PM. Entrance fee $9 for foreigners (or $4.5 with a student ID card).
The collection consists of 1600 pieces of Pre-Columbian gold work dating from 500 AD to 1500 AD. Information is given on the processing and making of the pieces as well as their social, cultural and religious meanings. At the same place you will also find The Numismatic Museum and The Temporary Exhibition Galleries. There is a nice museum shop and a tourist office at the entrance.