Thereisgrowing interestintechnologies that allow older adults to socialise across geographic boundaries. Anemerging technologyinthis spaceis social virtual reality (VR). Inthis paper we reporton aseriesofparticipatory design workshops that involved extended in-depth collaboration with22 older adults (aged 70-81), that aimedtounderstand their viewsonthe typesofsocial VR experiences that they sawasbeingofvaluetoolder adults. This process culminatedinareminiscence-based socialVRconcept. Our study identifies: participants' ideas about the types of social VR experiences they found appealing; the potential for social VR asapowerful reminiscence tool; how socialVRmightbeused asatooltochallenge ageing stereotypes and promote healthy ageing. Reflectingonthe design process, wediscuss how the diverse participant groups and the complexities involvedinme-diating between designers, the technical team, and participants could inform future design work.