Wikimedia Commons has media related to Garden decorations.

v t e Lawn and garden ornaments
Lawn	Bird bath Bathtub Madonna Concrete Aboriginal Concrete goose Garden gnome Lawn jockey Plastic flamingo Suncatcher Whirligig Yard globe
Garden	Flower box Window box Eyecatcher Folly Garden furniture Hanging basket Landscape lighting Nest box Outdoor fireplace Rain chain Sculpture Suikinkutsu Sundial Topiary Tōrō Weather vane Wind chime Wishing well