Not a good picture of the, but the pylons visible on the right side (and others that are out of the picture) are blamed for the Chicago flood in 1992. The pylons created pressure which caused cracking in the unused utility tunnels below ground that ran from basement to basement of the major buildings. Rather than fix it quickly, burocracy took over and it was left... until water got in past the mud that first filled the cracks, putting upwards of 40ft of water into the basements of many major buildings. Final cost: almost $2 billion. Oops.