Top 10 Most Beautiful Ionian Islands to Visit 1688 1Kastos Island Kastos is one of the most untouched Ionian islands. With very small villages and limited tourism infrastructure, it offers pure relaxation and isolation. Visitors come here to escape crowds and experience traditional island life.BackNext RELATED ARTICLESMORE FROM AUTHOR Blog (Articles) 9 Dreamy Greek Islands That Feel Like Another World Blog (Articles) The Most Beautiful Greek Islands for a Summer Escape Blog (Articles) Greek Islands That Still Feel Authentic Blog (Articles) The Best Greek Islands for First-Time Visitors Blog (Articles) 10 Greek Islands Every Beach Lover Should Experience Blog (Articles) 6 Greek Islands That Are Surprisingly Affordable