Permanent claim record · Detroit, Michigan

The J.W. Westcott II on the Detroit River is the only floating post office in the United States — it delivers mail to passing ships.

Verified

Raw value (vault-stripped)

{"tags":["floating-post-office","great-lakes","firsts"],"text":"The J.W. Westcott II on the Detroit River is the only floating post office in the United States — it delivers mail to passing ships.","category":"oddity"}

Predicate	trivia.fact
Subject	Detroit, Michigan (place)
As of
Status	Verified
Source	Michigan Pop Culture, Game Shows & Trivia Content Mine — Perplexity Deep Research (March 2026) (trust 6.5/10)
Reference	—
Document hash	pending evidence-pack link
Provenance chain
Claim ID	3b12ae58-cc9b-4563-bb51-b48813274b70