I also love the tree in City Hall Park, across the street from my office, which is actually a bunch of trees bound together in the fountain. Its decorated with ornaments made by children in the New York City public schools.
It looks especially great night and always cheers me up when I am depressed about the fact that it is pitch black at 5 P.M.
As for the whole Christmas Tree/Holiday Tree controversy, I have to say the term holiday tree always strikes me a little ridiculous. Instead of a war against Christmas, it actually seems to be a way to foist Christian traditions on non-Christians. On the other hand, Christians, I believe, stole the whole tree idea from the pagans, as a way to co-opt solstice celebrations and covert the masses. So perhaps solstice tree should be the official term.