This spot 40 minutes outside of Lisbon comes with stunning views, too. Published on May 11, 2026 Credit: Stacey Leasca/Travel + Leisure These days, travelers crave little-known destinations that offer mystery and adventure, whether it be ancient ruins or little-explored natural landscapes. If that's what you're looking for, we have the perfect place that will inspire a sense of wonder—and this Portuguese hideaway happens to be home to some of the bluest water on the planet, too.  Arrabida Natural Park is located just 40 minutes from Lisbon. It's a destination that feels almost too beautiful to be real, with lush green forests giving way to white-sand beaches lapped by gin-clear waters where pods of dolphins often play just offshore. Stacey Leasca/Travel + Leisure Here, travelers can spend their days lounging on the beach, taking a boat ride through the waters, or setting out on a challenging hike through the hillside.…