Also known as the Reserve Bank of Australia Museum is free, there is an excellent permanent collection as well as some great exhibitions including the role of the bank in World War I and the 50th anniversary of the decimal revolution, which I don’t yet fully understand, but it’s interesting. As a new collector of world currency, notes and coins, and a fanatical traveler and adventurer, I found the whole thing very interesting, spending about three hours here in total. If you like collecting money or just looking for a good place to spend hours in the gorgeous air-conditioned environment surrounded by money, then this is where you're coming.