The best "modern art piece" near the "Museum moderner Kunst", Vienna

I often walk near the Museum of modern art  (mumok - Museum moderner Kunst) in Vienna. This is a wonderful place with Maria-Theresien-Platz and MuseumsQuartier. I am not going to advertise any of the numerous art and nature museums. Just present a snapshot made near mumok. This is a wheel chained to a fence of the underground parking. For me, this is a symbol of modern art.