['I visited the apartment my grandparents used to live in. It brought back a lot of old memories.', 'Hopefully it brought back good ones. Were you close to them?', 'Yes, we saw them every week. They were very kind and I miss them.']
It's good you have those great memories, though!
I went to my grandparents' apartment. They have passed, but my aunt uses it now. It brought back many memories.