Lake Brienz is a stunning turquoise lake nestled in the Swiss Alps, known for its crystal-clear waters and picturesque surroundings. Visitors can enjoy a range of activities like scenic boat cruises, water sports, and hiking trails that lead to breathtaking waterfalls. With charming lakeside villages like Iseltwald and easy access from Interlaken, Lake Brienz is the perfect destination for those seeking a peaceful retreat in nature with plenty of outdoor adventures to explore.