Ann´s postcard

Dear Sue,
Greetings from London. It's terrific. Yesterday we went on a boat tour on the River Thames and we enjoyed looking at all the sights from the boat. We saw Tower Bridge, the Tower of London, the Houses of Parliament and the London Eye, which was my favourite. I wanted to go there, but there wasn't enough time left. Going back to the hotel we took the underground, which Londoners call the tube.It's the best way to travel around London and I liked it very much. It's a pity you aren't here.
See you,
Ann