Hoan Kiem Lake, also known as the Lake of the Returned 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 lake, and enjoy the scenic views. Don't miss the chance to see the famous red bridge, The Huc Bridge, which connects the temple to the shore.