It's the same tunnel where a piano mysteriously appeared back in May of 2023. Unlike the piano, this public artwork was solicited, and artist Kevin Burdick (Instagram) was chosen for the job.
The enormous, colorful work has an underwater theme and depicts fish that all live in Michigan waters, from salmon and steelhead to perch and large-mouth bass.
IPR's Michael Livingston went for a stroll through the tunnel and recorded his impressions, as well as those of passersby.
Listen to the audio postcard using the player above.