And in addition to what Linda wrote, the exchange rate is usually better in town than at the airport. There are many ATMs and in many places they accept credit cards.

There is a bank in front of Tesco, in Narodni Trida, that does a good exchange rate.

Just be careful with the very tempting 22 tram. It stops nearby, and it is quite handy to get to the castle, but as you could read in an article mentioned by Linda last week, it is also a place to be pickpocketed. I haven´t been, but I have seen it happening (well, more than seeing, feeling that it was happening) by exactly the same people mentioned in the Prague Post article. They seem to have been around quite a few years.

Kind regards, Covadonga in Bilbao