This is an infobox template for when you want a generic infobox for a park, preserve or similar facility of any kind. For the Map field, just use the built-in Google Editors Map and copy-paste the resulting code into the "mapcode" field. (288px is a good width to use.)
{{Infobox Park
|park=
|image=
|caption=
|type=
|size=
|facilities=
|operator=
|visitors=
|opened=
|location=
|mapcode=
}}