Visible from all over the city, the London Eye is one of the world's biggest observation wheels; a sedate rotation offers great views of the capital.
On a clear day you can see as far as Windsor Castle, 25 miles away, from the top of the London Eye, one of the world's largest observation wheels. A circuit on the London Eye will show you all the city's key sights in 30 minutes, and each of the 32 capsules (one for every London borough) is equipped with a touchscreen to explain what you're looking at. There are usually tickets available for walk-ups, but tickets are more expensive than if you book ahead online; disabled visitors and wheelchair users must book in advance. These days there are also a number of variations on the basic trip: Champagne, Hotel Chocolat tastings, perhaps a private capsule, or combining your visit with a London Eye River Cruise.