The Town Town Center Tower is not simply spikey--oh no, it's some kind of hybrid between a punk kid and porcupine. It's that seriously studded. I'm almost afraid to touch my screen, I feel that it will just jump out and, well, prick me. Pricks hurt.
Anyhow, aside from its intimidating exterior, the Town Town Center Tower actually does some good deeds (lesson: don't judge a book by its cover). Designed by Coop Himmelb(l)au, it is an eco-consciou energy positive building for Austria.