See the sights of London aboard an open-top, double-decker Big Bus as you admire 360-degree views of top attractions and listen to captivating commentary. Use your 24 hour or 48 hour tickets on three different routes with audio narration, and hop on or off at any of the stops around town. A one-way River Thames cruise between the Tower of London and Westminster Pier (in either direction) is included with all tickets.