The entrence costs just 8 pounds. You are staing 35 minutes on the boat. You can see a lot of sights. During the trip you can see the Big Ben, the London Eye or the Tower Bridge. You can start the boat tour at the London Eye.
You can buy sweets, snacks or drinks at a little shop and on the boat there is also a little toilet. You can sit outside or inside. There are windows so you can see from inside to outside.
You can lend audio guids for free at the little boat shop.You can listen to interesting information about sights at more than 10 languages for example: German, French, Italy, Russian, English or Japanese.