Here's one of mine.....
I was looking for a caravan and found one close by that was an unfinished 'restoration project'. The location was given simply as 'Parramatta'. Photos showed some details of neighbouring features, including the roof of some medium density housing across the road - and of the neighbour's roof.
Throwing a couple of phrases into Google brought me to a blog by a couple visiting family here in Australia that mentioned (1) the restoration project, (2) the exact year and model of the caravan (3) their daughter's name (the one inspired to initate the project) - which happened to match one of the names in the seller ID and (4) dates that were consistent with the statements made in the eBay listing.
There was too much overlap for this to be coincidence ... it had to be the same family.
Further reading of the blog gave hints on how far away certain facilities were - such as shops, restaurants, supermarkets and parks.
Alas, I had other priorities which prevented me from locating the property before the item ended ... but if I ever cast my eye over the right spot some time in the future, I'm going to recognise it!