If you've never been to London I could only say poor you. This city if that big and that interesting that you're not able to discribe it. But here's something you sould know when you decide to go to London: 1. always ensure you that you have your map with you otherwise only god can help you ;-) 2. always be careful in every way (it's not advisable to carry you IDs and you money in handbags backpacks) 3. if you want a cheap accommodation use youth hostels
Favourite spots:
Hyde Park Madame Tussaud's Downing Street Natural History Museum the Cabinet War Rooms ...
What's really great:
What I like best is the Speaker's Corner in the Hyde Park
Sights:
Speaker's Corner
Big Ben
the Green Park and St Jame's Park