Decorating trees with colorful eggs was once a trend and almost became an American tradition. Brought to the US by German immigrants, it is a symbol of fertility and good luck.
However, the tradition was discontinued as it is much easier to simply put eggs in a basket than adorn a bare tree with painted eggshells. In Europe, it's a different story as people still hang eggs on trees.
Until recently, one spectacular example of an ostereierbaum ruled them all. In Saalfeld, Germany, one local couple, Volker and Christa Kraft, decorated their home garden’s massive apple tree with tens of thousands of decorated eggshells.
(Image credit: AndrewPoison/Wikimedia Commons)