I just updated https://whenwhere.cf with working code to iterate over locations around where you are. You can find your local tag and post messages for that region, and you will not just see messages for your exact block but also locations around it. I am using an Ulam spiral to iterate over the locations around your block.
Give it a try around where you are!
Next step: creating a network without the necessity to create accounts that implements this.
If you want to support me, maybe favorite or review it at https://hivewhat.com/directory/whenwhere-cf-hive-messages-tagged-around-you/ and/or just simply try it out around where you are.