Ok, so while doing my research I got overly excited about visiing the giants causeway. We would like to do a daytrip (already have all 7 days hotel in ballsbridge so cant stay overnight), but is it true that the cheapest price is 100euro per person??? I checked irishrail.com and railtoireland? Oh and I also checked viator. com - they were 130. Any help would be appreciated. Also, if that really is the going rate, is it worth that much?