The sky was overcast and the view hazy while I was in downtown Hong Kong on my first morning in town, but that didn't keep me from hitting all the spots on my itinerary.
The 70-story building itself is nice to look at, but you can also go inside and visit an observation deck partway up one of the towers, on the 43rd floor.
The Bank of China Tower main entrance is on the water side, though you can get there from the back side as well (it's a bit confusing, though). Your bags will be x-rayed, and you need ID for the visitor's pass that will get you to the elevators that take you to the 43rd floor. Admission is free. You can visit 8 AM to 8 PM weekdays, to 2 PM on Saturdays; the building is closed on Sundays.
Beggars can't be choosers, and the view is nice on a clear day, but unless you love towers or are in the vicinity (as I was) you might want to skip this one.