Relevance: The recent discussions[0,1] on the sinking Millennium Tower (and possibly Salesforce East/350 Mission, based on the ESA isometric plots in [1]). The map[2] clearly shows that the corner of Mission & Fremont was once just offshore.
Additionally, as someone who's been lucky enough to live nearby, it's just absolutely cool to be able to 'walk' through history like this in an area that is largely derided as being sterile and faceless.
[0]: https://news.ycombinator.com/item?id=12206158