If I want to travel in mainland Greece and the islands, do I have to buy 2 Passes?
Yes, the Eurail Greek Islands Pass only offers ferry trips to enjoy island hopping on the Greek Islands. If you would like to travel by train in mainland Greece or any other countries you should combine the Greek Islands Pass with an additional Pass that is valid for those countries.
Change of currency
You cannot change the currency once you have a Pass in your cart. Remove the Pass, and then change the currency on the website header.