Just across the sea, mere minutes away from Thirassia stands its sister island, the magnificent Santorini. The imposing caldera, frosted with the iconic white cave-houses and blue-domed churches is a cosmopolitan destination attracting thousands of visitors annually, and it’s truly worth visiting, for a multitude of intriguing experiences. So, make sure that you devote a day on your way to or back from Thirassia, or even an island-hopping day in-between, to exploring the stunning Santorini.