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 serene and peaceful atmosphere. 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 forget to capture some stunning photos of the iconic red bridge that connects the temple to the mainland.