It's surprising to see Boston this high on the list despite the insurmountable limits it faces building upward: 1) The Logan height restriction that much of do

It's surprising to see Boston this high on the list despite the insurmountable limits it faces building upward: 1) The Logan height restriction that much of downtown faces due to the airport's proximity: https://www.massport.com/media/11778/BOS_COMPOSITE_Ver2pt0_dec201_small.pdf https://www.massport.com/media/11778/BOS_COMPOSITE_Ver2pt0_d... 2) The city's most desirable neighborhoods (Back Bay, Beacon Hill, South End, Charlestown Navy Yard) are protected as historical districts: http://boston.maps.arcgis.com/home/webmap/viewer.html?webmap=95cbbaff8b664fd9aac5f00ee50b8c05 http://boston.maps.arcgis.com/home/webmap/viewer.html?webmap... 3) The overall NIMBY attitude toward new development (surmountable yet heavily suppressed by nearly 400 years of it): https://www.bostonglobe.com/metro/2015/04/23/boston-storied-history-nimby-ism/ABus2RAm8JRWdIWjq15alM/story.html https://www.bostonglobe.com/metro/2015/04/23/boston-storied-... That said, there are somehow 5 in the pipeline at 600+ feet: http://boston.curbed.com/maps/boston-tallest-buildings http://boston.curbed.com/maps/boston-tallest-buildings