Come for a ride on Europe's largest Ferris wheel. The views from the top are simply fabulous, especially at night.
From the top of the Eye, you can see the whole city centre with all its iconic sights (e.g. the Big Ben, the Palace of Westminster, the Westminster Abbey etc.). Even though the wheel is absolutely safe, you might feel slightly nauseous if you are afraid of heights, so you might want to consider that before visiting.
It is also highly recommended to pre-book your tickets online and arrive around half an hour before your scheduled time so that you have enough time to collect them.