I know it was easier for me to get Chinese Yuen at the airport than trying to get it back home before I left.  Other popular currencies are easier to obtain in your own country but sometimes you can getter better rates as well when you arrive at your destination than in transit.  Check it out well in advance as it may cost you more from your travel budget than you had planned.  I must admit though that I like to be prepared so usually I get foreign currency at the airport or from a bank or agency before I leave.

You may also like to estimate how much foreign currency you will get for your own money so you can make sure your budget is on track before you go.  You can try the Currency Converter below to do a rough check.  Currency rates change from day to day, and from buying and selling, but this will give you a good idea and I suggest you check again before you leave home for your travels.

To conclude what I suggest you do is research your destination carefully.  Check if there are many opportunities to get cash in local currency (from teller machines, banks or hotels) and otherwise take traveler's checks.  Hotels and cruise ships will also cash your traveler's checks in local currency.  Otherwise you will need to take more cash than you would normally feel safe to carry and in that case you need to do your budget very carefully.  Have a great time on your vacation travel and enjoy the experience of exploring new places.