take in the lights & sites of london from the unique viewpoint of the eye, coupled with a tour aboard a river cruise.. at 135 metres, the london eye is the world's tallest observation wheel, with 40 kilometre panoramic views on a clear day. the gradual flight in one of the 32 high tech glass capsules takes Approx. 30 minutes & offers spectacular views of london & its famous landmarks. highlights include big ben & the houses of parliament, st. paul's cathedral, westminster abbey, trafalgar square, tower bridge & the tower of london. new to the london eye is the groundbreaking 4d film. 4d adds a new dimension to traditional 3d technology; using sensory effects such as wind, snow & even smell to bring to life the images on screen. this short film takes place in county hall & is about a girl struggling to see the landmarks of london, until she rides the london eye.take a london eye river cruise & see london from a different perspective. enjoy a unique 40 minute circular sightseeing cruise on the river thames with fascinating live commentary that brings the city to life, presented by specialist guides. before you can board the eye, you are required to exchange your london eye voucher for your london eye & river cruise tickets at the ticket hall within county hall, next to the eye. if you wish to see the new 4d experience before your flight, we recommend you check-in 45 minutes before your experience time. you will need to return to the priority check-in desk 15 minutes before the scheduled experience time. alternatively visit the 4d experience at your leisure after your experience on the london eye. you may visit each attraction in any order, however please leave yourself plenty of time in case of any delays.