Another classic stop on the Milford Sound drive. It’s a super quick one just a 5-minute stroll along a boardwalk but worth pulling over for. On a still day, the reflections of the mountains in the lake are unreal, like you’re looking into a perfect mirror (hence the name). It’s a good little leg-stretch with some serious photo potential, and one of those spots that feels like pure Fiordland magic without needing to hike hours for it.