"Maps" has an animal hospital (that is 20+ miles from my location) tagged with a "Red" pin that does not have a "delete" option. It's the only "Red" pin showing within a 100 mile sweep of my location.
Try tapping the bookmark icon to the right of the search bar in the Maps app, tap Recents, at the bottom, then tap Clear at the top (this will clear you recent searches and their associated dropped pins).
No worky. Still there.
If you have anything in the search box tap the "x" to clear it.
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