One of the most noteworthy though underrated parties in Ibiza is Flower Power with original Pacha jock DJ Piti. This happy hippy fiesta is probably one of the lesser known to the majority of outsiders who visit the island, but it is easily one of the most popular amongst those in the know.
Totally unique atmosphere to almost anywhere in the world, likely to give you memories that you'll take to your grave and bring a tear to your eye every time you think about them. One example is the time every single person in the club joined hands whilst chanting John Lennon's "Give Peace A Chance". Supreme!
2013 see's the party take things to a whole new level, as the usual 4 parties a season are replaced with a party every Tuesday from 4th June to 1st October. That's 18 days of trying to make peace with your inner self. Good luck.