"archaeological_site"=>"roman_villa","historic:civilization"=>"roman","wikidata"=>"Q7478143","wikimedia_commons"=>"Category:Roman villa Steenland"
"archaeological_site"=>"roman_villa","historic:civilization"=>"roman","wikidata"=>"Q7478129","wikimedia_commons"=>"Category:Roman villa Op den Billich"
"archaeological_site"=>"fortification","defensive_works"=>"motte","fortification_type"=>"motte","historic:civilization"=>"medieval","wikidata"=>"Q3049892","wikimedia_commons"=>"Category:Wijnandsrade Motte"
"email"=>"info@gemeentegrot.nl","fax"=>"+31 43 601 4522","toilets:wheelchair"=>"yes","wikidata"=>"Q5500107","wikimedia_commons"=>"Category:Gemeentegrot"
"historic:civilization"=>"roman","location"=>"underground","wikidata"=>"Q17454165"