These are the MUST GO places of London.
From the London Eye you can see the city from above. It's fantatic. It takes about an hour.
The Museum of Madam Tussaud is unbelievable. Every statue is perfect and it's easy to confuse with the real person, when you show your pictures to your friends.
The Tower of London is next to London Bridge and there are the queen's jewellery. Also fantastic.
If you buy the tickets together, it's not that expensive.