I just finished boking 2 tickets to london and return from Paris. Now what? it's about 2 weeks to split up how ever we like. Would love any suggestions that you have! Perhaps trips outside the city. Given all the great comments we have decided on the County Hall and the C-E in Paris.....and that is all the plans so far!! Thanks for all the tips so far. You are a big help to people like me that have not done this before. Thanks!