That view when you step out of south station was always so underwhelming for the location right in downtown. For some reason the angle was just right where there was a hole in the skyline and some really stumpy buildings and a big dig service building that blocked out the whole skyline. Winthrop ctr has finally changed that forever and its nice to see.
The one thing this perspective--all these wonderful photos posted in this thread, from this exact vantage point--conveniently overlooks, of course, is this. A remarkably blighted structure, abandoned and given over to rot since at least 2010, if not prior. Of course, it does represent some exceptional redevelopment challenges, in terms of any would-be developer seeking to "go tall" there, to recoup purchase price and obtain sufficient ROI.
For what it's worth, the FOR SALE page for 51 High: https://greenway-bldg.com/. Per the City of Boston, owner is still John Walsh.