Cache is located in Southwest Park in Webster Groves. There is plenty of parking nearby. It is a short walk over generally well-mowed grass. There is a nearby playground for the kids but that is not near enough to hinder your search.
Southwest Park is the location of the historic home museum, Hawken House. It was built in 1857 by Christopher Hawken who is a descendent of the Hawken Rifle maker. It is open for tours.
There used to be another cache in this park some time ago. I remember finding it and getting back to my car to discover I had locked my keys and cell phone in the car. There were people walking but none of them had their phones with them. I had to ask several people before I found someone who could call AAA for me. Hope your experience will be better.
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