Hoan Kiem Lake, also known as the Lake of the Restored Sword, is a must-visit attraction in Hanoi Old Quarter. Surrounded by beautiful gardens and ancient temples, the lake offers a peaceful escape from the bustling city. Take a leisurely stroll around the lake, visit the Ngoc Son Temple located on a small island in the middle of the lake, and enjoy the scenic views. Don't miss the chance to see the famous red bridge, The Huc Bridge, which adds to the charm of the lake.