This is lovely. It's London re-imagined in 1899 as La Serenissima-upon-Thames. Go see.
Of course, when London gets flooded for real by the middle of this century, the city will not look quite as charming. No Lonely Planet devotee would want to go there during his gap year. Instead, it would most certainly become a pestilential swamp, ridden with malaria and mutagenic superviruses, a methanous bog slowly digesting St. Paul's.
And behind every crumbling facade, a coven of sub-humans patiently waits for the night when they can continue their hunt for Will Smith.