There’s no question that Chicago boasts some of America’s best architecture. But a high-quality backdrop makes it all the more obvious when an architectural mishap has occurred, and Charles Leroux worries that they’ve been happening a lot lately. “The biggest architectural blunder is the devastation of the city’s neighborhoods by bad residential structures tossed up to take advantage of the real estate boom. Some communities have been rendered almost unrecognizable by condoing, townhousing and McMansioning.”