Coronado Heights is a city park. I've detected it a little. Found a Bic lighter and a LOT of beer bottle caps (it;s a hang out place).
I think it's surrounded by private land though. I just checked and my ownership maps don't go that far north. It's in Saline County.
The land around it is mostly pasture.
I wonder about the stories of gold in KS. Why carry it this far north?