Yes, it is known for tulips, weed, clogs and a red light district. And I agree that there is much more. Air travel is great, the airport is wonderful and the Amsterdam transport system is incredible. Oh, and the weed is SO good!
London is great. Not #1 on my list of cities to return to, but it's got a special place. Lots to do, especially in the downtown area. Many sites to see, as well. Don't forget the London Eye, as well as Buckingham Palace. And if you're not familiar with the dish, try real fish 'n chips - London style.