An example GeoJSON feature showing the highest peak in Ireland, Carrauntoohil in the Macgillycuddy's Reeks mountain range.

carrauntoohil.json

{
  "type": "Feature",
  "geometry": {
    "type": "Point",
    "coordinates": [-9.7427,51.9994]
  },
  "properties": {
    "name": "Carrauntoohil",
    "elevation": 1038
  }
}