Only in London ★★☆
Classic sights and experiences that just scream "You're in London now!"
Double-decker buses ply the streets of many cities. Plenty of countries have their own crown jewels. You can have an afternoon tea in just about any place once colonized by the British (once I enjoyed tea on a small Falkland Island near an penguin and albatross nesting ground while whales breached in the water below; surreal).
In short, this is the London, and this is what you came for.