If exchanges at your home country don`t provide the needed currency for your travel, there is no need to worry. Instead, get currency out from the ATM when you arrive to your destination country. Usually they offer the best rates possible but be aware of any extra fees charged by your bank. Also, make sure to use bank owned ATMs as they tend to be safer than independent machines. To cover yourself in an emergency, make sure to stash some extra cash in a few different places. If you lose your wallet, your card stops working, or the ATMs run out of money, you will be glad you did.