title: How to make a GeometryCollection in GeoJSON with a single point + polygon?
body: <p>How do you add a point to a polygon as a single feature? According to the GeoJson specs, this is known as a "GeometryCollection". </p>
  
  <blockquote>
    <p><strong>Example of a 'GeometryCollection':</strong></p>
  </blockquote>
  
  <pre><code>{ "type": "GeometryCollection",
  "geometries": [
    { "type": "Point",
      "coordinates": [100.0, 0.0]
      },
    { "type": "LineString",
      "coordinates": [ [101.0, 0.0], [102.0, 1.0] ]
      }
   ]
  }
  </code></pre>
  
  <p>I tried adding a point to a polygon feature, but I couldn't get it to show on my mapbox map because I guess it is invalid GeoJson. </p>
  
  <p><strong>Anyone know what the proper way of doing this is? There are not many examples to follow on the web.</strong></p>
  
  <blockquote>
    <p>My take:<a href="http://jsfiddle.net/rh8ok5t8/15/" rel="noreferrer"> <strong>[jsfilddle]</strong></a></p>
  </blockquote>
  
  <pre><code>var myRegions = {
   "type": "FeatureCollection",
    "features": [
      {
        "type": "Feature",
        "properties": {},
        "geometries": [
          {
              "type": "Point",
              "coordinates": [
              61.34765625,
              48.63290858589535
              ]
        },
          {
          "type": "Polygon",
          "coordinates": [
            [
              [
                59.94140624999999,
                50.65294336725709
              ],
              [
                54.931640625,
                50.90303283111257
              ],
              [
                51.943359375,
                51.04139389812637
              ],
              [
                50.9765625,
                48.19538740833338
              ],
              [
                52.55859375,
                46.46813299215554
              ],
              [
                52.998046875,
                43.8028187190472
              ],
              [
                54.4921875,
                42.391008609205045
              ],
              [
                57.041015625,
                43.29320031385282
              ],
              [
                59.8974609375,
                45.398449976304086
              ],
              [
                62.5341796875,
                44.08758502824516
              ],
              [
                65.6982421875,
                45.73685954736049
              ],
              [
                68.37890625,
                48.3416461723746
              ],
              [
                65.8740234375,
                49.18170338770663
              ],
              [
                63.720703125,
                49.97948776108648
              ],
              [
                63.80859374999999,
                52.348763181988076
              ],
              [
                61.4794921875,
                52.32191088594773
              ],
              [
                59.9853515625,
                51.86292391360244
              ],
              [
                61.9189453125,
                51.09662294502995
              ],
              [
                60.5126953125,
                50.51342652633956
              ],
              [
                59.94140624999999,
                50.65294336725709
              ]
            ]
          ]
        }
     ]
    }
   ]
  };
  </code></pre>