You need some time to understand and visit London. Hard to say how much time. Some cities accepted me fast, other much more difficult. I can’t name the reasons.

London accepted and swallowed me very fast, in 4 days (personal record). But for that I filled the following necessary steps, which I am recommending to you now, as you can do them cheap or free:

1. Catch and make photographies of the well known citymarks: Palace of Westminster and Big Ben; Westminster Abbey; St. Margaret’s Church; Tower bridge; Tower of London.

2. Visit the Royal Botanical Garden in Kew, which is superb and huge. Besides very many plants (it is one of the leading Botanical Gardens in the world) you can see many exotic ore old constructions (pagoda, Japanese house, etc)

3. Greenwich Observatory, which sets the time worldwide.