OSM tag name=Blumeninsel Mainau matches Blumeninsel Mainau in these Wikidata fields:
| Gardens in Baden-Württemberg | leisure=garden, natural=wood |
| Islands of Baden-Württemberg | place=islet, admin_level, boundary=administrative, place=island |
| Islands of Lake Constance in Germany | place=islet, admin_level, boundary=administrative, place=island |
| Lake islands of Germany | place=islet, admin_level, boundary=administrative, place=island |