[Tagging] Are tunnels only below ground? (Was

[Anthony]

By the way...

On Wed, Nov 4, 2009 at 7:56 PM, Randy <rwtnospam-newsgp at yahoo.com> wrote:
> From the picture, it appears that where the road is covered by the
> building there is actually a pedestrian way and doors into the building
> from the highway. If that's the case, then it is clearly not a tunnel, be
> it above or below ground.

If it were underground (with doors into a basement), I'd probably call
it a tunnel.  Are subway platforms tunnels?