30 Secret Travel Spots You’ll Wish You Discovered Sooner

13. Enchanted Waters of Croatia’s Mljet Island

Mljet Island, often called Croatia’s greenest island, is a hidden treasure of unspoiled nature and serene landscapes. The island’s National Park is a highlight, featuring two saltwater lakes surrounded by dense forests. Visitors can kayak across the tranquil waters, hike through lush trails, or explore the small islet of St. Mary, home to a 12th-century Benedictine monastery. The underwater world around Mljet is equally captivating, with opportunities for diving and snorkeling among colorful marine life. With its blend of natural beauty and historical charm, Mljet Island is a peaceful retreat for those looking to escape the crowds.