Vulcano Island, Italy (13/20)

Vulcano, part of Italy’s Aeolian Islands, is a paradise for volcanic adventure lovers. The island is home to one of the world’s most accessible active volcanoes, with a crater you can hike to in just an hour. Once at the top, you’ll be rewarded with stunning views of the island, the Mediterranean Sea, and the nearby islands. For those looking to relax, the island also offers sulfurous mud baths and hot springs for a volcanic spa experience.