When in the Balearic Islands, be sure to spend time in Formentera, the smallest of the main four islands. Here, the terrain ranges from rocky cliffs lined with hiking and biking trails to the secluded beaches and sand dunes of Illetes and Migjorn. While there aren’t as many things to do in Formentera as in neighboring, party-packed Ibiza, many say this is a good thing. Explore the island at a relaxed pace and do some serious sunbathing and book reading, or add some adventure with stand-up paddleboarding, snorkeling, or cycling.