Combine London sightseeing with a white-knuckle speedboat ride on a 50-minute Thames River cruise. Board your modern RIB (rigid-inflatable boat) and soak up the unparalleled views of top city attractions including Big Ben, the London Eye and St Paul’s Cathedral. Learn about the city’s history from your entertaining guide, and then feel your adrenaline rush as your skipper pulls back the throttle and you rocket along the Thames River at speeds of up to 35 miles (56 km) per hour. Small-group experience with numbers limited to 12 people.