The gorgeous buildings, the big city atmosphere of it all, the many restaurants and clubs.
Memorable moments - seeing the Houses of Parliament all lit up at night (how much more British can you get?), a sunny afternoon in Hyde Park, browsing through Harrods, feeling pathetically out of place in this ritzy department store, and later that day, happily but desperately shopping along Oxford Street, searching for a sweater.
Quick Tips:
Even if you're going in the summer, BRING A SWEATER because London weather, like Vancouver, is uh, rather temperamental. My day usually went like: chilly morning, sunny but windy afternoon, and an even chillier night.
Best Way To Get Around:
Lots of walking. But then on my second day, I 'discovered' the Tube and since then, it was Tube here, Tube there. Still, there's no better way to see a neighborhood than by WALKING it.