There are lots of different tour boats that you can choose from but we did the one that's the combination London Eye and London Eye boat cruise by LastMinute.com. The boat has a top floor that's open air and a bottom floor that is completely covered and you can switch between the two throughout your tour. The entire tour lasted maybe 45 minutes, but it was nice to see London from a different angle on the Thames. Our guide Alan was very entertaining. He knew lots of fun facts but also kept it light and funny. There was a snack bar on the boat, but we weren't able to take advantage of it. read more