Have afternoon tea at Sketch — the most Instagrammable restaurant in London. This photo is from "the parlour," the front cafe that's open to anyone and easy to grab a quick bite or cup of tea in. The real gem is the pink room, technically called The Gallery, but you'll want to book reservations to ensure you can get in. No matter where you go, be sure to check out the bathrooms . . . they are out of this world (seriously).