Нужно написать 6-8 предложений. what palace in london would you like to visit and why ?

Я так понимаю, там "place", a не "palace".
I would like to visit Madam Tussauds Museum. Because I think it's very interesting. There, you can see a lot of famous people. They look like real. So, in my opinion it's one of the best place in London