The Santorini Caldera is a large volcanic crater located in the Aegean Sea, formed by a massive eruption around 3,600 years ago. This geological feature is part of the island of Santorini, which is known for its stunning views, white-washed buildings, and vibrant sunsets. The caldera is surrounded by steep cliffs and is filled with seawater, creating a picturesque landscape. The caldera is home to several small islands, including Nea Kameni and Palea Kameni, which are volcanic in origin. Visitors can explore these islands and witness the geothermal activity, such as hot springs. The Santorini Caldera is a popular destination for tourists seeking natural beauty and unique geological formations.