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 pagodas, the lake offers a peaceful escape from the bustling city. Legend has it that Emperor Le Loi was given a magical sword by a turtle in the lake, which he used to drive out the Chinese invaders. Visitors can take a leisurely stroll around the lake, visit the Ngoc Son Temple located on a small island in the lake, or simply relax on one of the benches and enjoy the serene atmosphere.