An interesting take on American metropolitan regional boundaries

https://www.atlasobscura.com/articles/here-are-the-real-boundaries-of-american-metropolises-decided-by-an-algorithm?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=1cac85f705-EMAIL_CAMPAIGN_2020_07_24&utm_medium=email&utm_term=0_f36db9c480-1cac85f705-64536349&mc_cid=1cac85f705&mc_eid=9337bd4ceb