Wow, the Metro Detroit area is massive. Almost a solid blob from Detroit to Ann Arbor up to Pontiac.

Cheat sheet:

Upper right corner is Port Huron. Upper left corner is Lansing, then moving rightwards across the top are Flint and Port Huron. The small blob at the top is either Midland or Saginaw. Below Lansing is Jackson, then Toledo mid-left. The big blob mid-right is Cleveland.