My parents met in San Francisco in the summer of 1969. Their first date was a Peter, Paul, and Mary concert. You get the picture.
When they got married they didn't send out paper wedding invitations, instead they cut large rounds of plywood into large puzzle pieces and sent those out. They asked people to decorate the puzzle piece and then bring it to the wedding. When all the pieces were together again my parents planned to glue them together and use them for their dining room table. This didn't quite happen and the pieces are still in boxes in the attic. But we got them out the other night and I was so impressed and wowed and generally blow away.