Once again another amazing offer from the crystal centre. This summer card offer runs from mid June to august the 31st 2014. It is ideal for tourists,Family's,students or kids on summer holidays. simply pay €10 we will issue you with a card with 3 visits on it which works out at €3.33 per visit. (you must use the 3 credits each week, they don't carry over), then top up again for the next week you wish to use the card.UnBeatable value.