Spawned by cheap coach line Megabus, it’s cheap and cheerful: as little as £1 when booked ahead. For that, you get a one-way, 2-hr. loop around town on an open-topped blue double-decker with three stops (Park Lane, the London Eye, and the Tower of London). Narration is recorded—one of the two voices is a Blue Badge guide—and triggered to play in the right spots by GPS. It even goes across Tower Bridge.
48 Buckingham Palace Rd., SW1
Our Rating Hours Daily 10am–7pm. Must book online. Phone No public phone. 2-hr. Prices Tours £1 to £7, depending on capacity Web site MegaSightseeing.com
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.