✉️ Detroit has the only floating ZIP code in the U.S. (48222) Detroit is home to a floating post office boat, the J.W. Westcott II, which delivers mail to freighters on the river. Founded in 1874, the mailboat still brings letters and packages to passing Great Lakes ships “mail by the pail.” Be honest — had you heard of this floating post office? #floatingpostoffice #greatlakesstate #MichiganHistory #greatlakes | Welcome Home History