Woodstock Cave (Q32043657)

• matcher place: City of Cape Town (relation 79604)
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• Overpass query: show query – Overpass Turbo

  [timeout:300][out:json];
  (
      node(around:1000,-33.94972,18.44083)[location=underground][~"^(addr:housenumber|.*name.*)$"~".",i];
      way(around:1000,-33.94972,18.44083)[location=underground][~"^(addr:housenumber|.*name.*)$"~".",i];
      rel(around:1000,-33.94972,18.44083)[location=underground][~"^(addr:housenumber|.*name.*)$"~".",i];
      node(around:1000,-33.94972,18.44083)["natural"="cave_entrance"][name];
      way(around:1000,-33.94972,18.44083)["natural"="cave_entrance"][name];
      rel(around:1000,-33.94972,18.44083)["natural"="cave_entrance"][name];
  );
  out center tags;

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Search criteria from Wikidata

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cave (Q35509)	natural=cave_entrance
subterranea (Q863404)	location=underground