Langisjór, known as the most beautiful lake in Iceland, is a hidden gem nestled deep within the Icelandic Highland. This vast and mysterious lake is not your typical tourist spot, as it requires some effort to reach its shores or climb nearby mountains for a breathtaking view. With its 20-kilometer length and narrow width, Langisjór lives up to its name, which means "long sea." Surrounded by majestic mountain ridges and dotted with small islands, this turquoise-colored lake is a natural wonder that will leave you in awe. Although it's not the easiest place to visit, especially due to its limited accessibility from July to September, a guided tour is highly recommended to fully experience the beauty of Langisjór and its surrounding area. So, if you're up for an adventure and want to witness the splendor of this hidden treasure, Langisjór should definitely be on your bucket list.