Here is a new bridge (and an adjacent one) that links the
new airport to urban Hong Kong.
There is a little mount (called the View Point, I believe) where
you can get a closer look of it than riding in the car or bus. There
is a little visitors' center with photos of the constrution process
and other great bridges of the world.
A great time to go is probably at sunset. If you have time to
stick around a little, the lights of the bridge come on at 8:30pm,
from what I have heard.
It is reachable only by a bus running on holidays (route 243R),
taxi, or private car.