To see the entire wall and its surroundings, highly suggest you rent a bike. Single and tandem bikes can be rented from a stall by the South Gate entry point or several other locations along the wall. Rental for a tandem bike cost 90 CNY (13.32 USD) for 2 hours with a 300 CNY (~44.50 USD) deposit that you get back when you return the bike. You can return the bike at any of the bike rental locations atop the wall. At a leisurely pace, biking the entirety of the city wall takes approximately 1.5 to 2 hours.