As one of the New Seven Wonders of the World, Badaling Great Wall is a must-see in Beijing! This is one of the best-preserved sections where the magnificent wall snakes along mountain ridges, showcasing ancient engineering brilliance. Beat the crowds by arriving at sunrise—climb watchtowers for breathtaking valley views or conquer the legendary 'Hero's Slope' (prove your mettle!). Visit in spring for blooming flowers or autumn for fiery red foliage, and don't forget comfy shoes!