1. The Big Ben.The world-known clock. Everyday about 500 tourists come to London to see the Big Ben. Built in 1858, it was named after an architect whose name was Ben (Benjamin). The interesting fact is that you are not allowed to get inside the Big Ben if you aren’t an Englishman. No tourists allowed.2.The Houses of Parliament.The official name is Palace of Westminster. It includes more than 1,100 rooms, more than a hundred stairs and about 5 kilometers of corridors. the House of Commons and the House of Lords (two traditional chambers) are located here. Nowadays anyone can visit the Houses of Parliament and even attend the session. You have to register by phone and go through special registration procedure.3. London Eye.It is one of the biggest observation wheels in the world. Its height is 135 meters. It has 32 cabins which symbolize 32 districts of London. It takes 30 minutes to make a full circle. But it is the view you will never forget.