If the London Eye hasn't given you enough of a lift, you can go even higher, to over 500ft (weather permitting) in the hot-air balloon situated behind Vauxhall tube station in Spring Gardens. Though the Skyview Balloon (daily 10am-dusk; £9.95; www.skyviewballooning.com) is the largest tethered helium balloon in the world, it remains to be seen whether it can withstand the competition from the wheel.