The Dartmouth Commons are a beautiful public space enjoyed by locals and tourists. You can play a round of disc golf, watch a softball game, stone-fire a pizza, and meander through the beautifully arranged Leighton Dillman Gardens. You can also find one of the city's most scenic views at the top of the hill, and look across the harbour from the central gazebo.
This cache is not too far off the path, but won't be visible from it. Not ground level and not hanging, good luck!