Sky's the Limit

Architects must feel that too many of us walk the city streets with our heads down — if it's more than 20° above eye level, we're just not seeing it. And in London, that means missing out on a lot. Tall buildings are lifting the skyline, and some of the city's major hubs, from the shabby (King's Cross in the north) to the tacky (Elephant and Castle in the south), are getting face-lifts. For a neck-craning look at some of these renovations and more, make time for the second London Architecture Biennale, which runs June 16-25. The event showcases the city's...