Just offshore, the Pakleni Otoci (Satanic Islands") are visible, green hills jutting up through the placid water like a partially submerged Jolly Green Giant asleep in a tepid bathtub of electric-blue Kool-Aid.Yes, it is nice.We usually swim every day, sometimes two times a day, Tonci tells me.The Dalmatian island of Hvar is the sparkliest star in the thousand-plus-island constellation that sits