Stefanos Crater: A Walk Within Nisyros's Volcanic Heart

Stefanos Crater, located in the heart of Nisyros, is one of the largest and most well-preserved hydrothermal craters in the world. This geological wonder offers visitors a unique and unforgettable experience: the chance to walk inside an active volcano. The elliptical crater stretches approximately 350 meters in diameter and reaches a depth of around 27 meters. Formed approximately 3,000 to 4,000 years ago, it is part of the larger Nisyros caldera, a 4-kilometer-wide volcanic landscape shaped by multiple eruptive stages over the past 150,000 years. As you descend into the crater, you'll be surrounded by an otherworldly landscape of yellows, whites, and oranges created by sulfur emissions. The air carries a strong smell of sulfur, a constant reminder of the volcanic activity beneath your feet. Steam vents, known as fumaroles, release heat and gases from deep within the earth, creating a mesmerizing spectacle. Nisyros itself is a volcanic island, the youngest active volcano in Greece, along with Methana, Santorini, and Milos. The island's fertile volcanic soil contributes to its unique biodiversity, setting it apart from other volcanic landscapes in the Aegean. The volcano is active, though not erupting, with the last steam explosion occurring in 1888. The island's volcanic activity has also created thermal hot springs, adding to its allure. According to mythology, Nisyros was formed when Poseidon cut off a piece of Kos and threw it at the giant Polyvotis during a battle. The island's earthquakes are said to be the cries of the giant trying to escape. To enhance your visit, wear sturdy shoes as the ground can be uneven and hot in places. It's also advisable to bring water, sunscreen, and a hat, especially during the summer months. Consider visiting early in the morning or late in the afternoon to avoid the heat and crowds.