Formed from a large volcanic eruption, Santorini is, in essence, a submerged volcano and caldera. Its cliffside villages are famous throughout the Mediterranean, and these offer panoramic views and luxury spas. Fira, the capital, blends magical surroundings with high-end shopping. Boutiques and street vendors stand side by side with upmarket jewellers, galleries and designer clothes shops. Take a trip down the impressive cliffs to Santorini’s old port by cable car and capture Fira from below. However, when you think of Santorini, it's likely the image of Oia and its many domed roofs come to mind. Set on northern tip of the island, overlooking the whole of the caldera, Oia is known throughout the world for its spectacular sunsets. Here, you can watch the sun bask the Aegean every evening from some of the most exclusive hotels on the island, many of which have private pools and Jacuzzis. Imerovigli is perched on the highest point of the caldera's edge and is known locally as the balcony to the Aegean, offering some truly panoramic views out to sea. Take a stroll here, and you'll wander past eye-catching churches and monasteries, as well as the ruins of a Venetian castle, so bring your camera, you'll need it. In the evening, enjoy a night of luxury in your private hot-tub.