<a href="https://commons.wikimedia.org/wiki/File:Quarto_ponte_sul_Canal_Grande.jpg">Filippo Leonardi per Comune di Venezia</a>, <a href="https://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>, via Wikimedia Commons
The city of Venice has decided to replace the glass on Santiago Calatrava’s Ponte della Costituzione with stone, as the slick surface was the cause of numerous incidents. The decision comes after several attempts to limit slips using resin and non-slip stickers, even placing keep-off signs on the glass surface when the winter weather rendered the floor increasingly dangerous. Inaugurated in 2008, the bridge has been the subject of controversy and protest from the onset, as the building costs and timeframe surpassed initial estimates and complaints about falls began early on.