With the vision of more CBD caches in Launceston, I chose Civic Square as it has become a vibrant and modern space in the CBD after a refurbishment in '17/'18.
Civic Square is surrounded by the police station, library, town hall, and the arguably unsightly Henty House. The square is the location for night markets held monthly.
Please be stealthy when looking, retrieving and rehiding if it's a busy time with muggles around. When you replace it, make sure it's back in its same spot and isn't clearly visible. You're looking for a magnetic mint container with a log only. BYOP.