Chicago is the home of many landmark high-rises and grand park spaces, and the city's architecture photographers are perhaps the best folks to ask when seeking a spectacular vantage point of downtown. And much like the city's diversity in building design, Chicago's photographers have their own flavor and offer a different take on the same city. It's no surprise that architectural photography will play an important role in the Chicago Architecture Biennial, as the way photographers frame a streetscape or a tower's stance influences the impact and feeling that a building or environment has on us. Chicago's photographers are the unofficial yet crucial historians of the city's changing landscape. We reached out to a few regular contributors to the Curbed Chicago Flickr pool to discuss underrated buildings and best photo opportunities.