This is Trang Tien Plaza. Located just across from Hoan Kiem Lake (on the south eastern corner), it's one of the more 'flashy' shopping places in Hanoi. There are a number of floors (5 or 6 if i remember correctly). Located on the first floor are watches (quite a few well known brands) and also electronic equipment (cameras, etc) with a supermarket and other places to buy food located on the top floor. The first floor is quite nice, but i don't think much of the somewhat bland top floor. It's a bit tacky, really.