Whether or not geology is your thing, you’ll definitely be interested in these glow-in-the-dark rocks you can find in Michigan. By day they look like normal stones, but at night, the Yooperlites®, glow in the dark.
Yooperlites® are syenite rock rich with fluorescent sodalite, which causes them to be streaked with yellow and orange in the dark, especially under a UV light. The term was coined by Erik Rintamak in 2017, according to Pure Michigan. The best place to find them in the state is the Upper Peninsula along Lake Superior.