Detroit has a very large Chaldean community. I can think of 3 Chaldean parishes within a 10 mile drive of my house.
Metro Detroit is home to the Catheral for the Chaldean Diocese for the Eastern US ( the Cathedra for the Western US is in San Diego)
Also, the Seminary here ( Sacred Heart), in addition to being a Latin Church Seminary, also trains Chaldean men for the priesthood in the Chaldean Church. To my knowledge, it is the only Chaldean seminary outside of Iraq.
There are also at least two Maronite parishes in the Metro Area.
Not quite as many Byzantine parishes as Penn or Cleveland though.
As a side note, we actually have a Chaldean Sub Deacon in our Latin parish. With the permission of both bishops, he vests as such for Mass.