Lundy Canyon has no natural lakes. At the mouth of the canyon there is a manmade lake and if you go deeper into the canyon you will come across this series of beaver ponds. This is the only place in Sierra Nevada with beavers since they were hunted so much in the past. Beyond the beaver pond you can see a waterfall coming down from the upper parts of the canyon. The red metamorphic rock is not typical to most of the mountain range which is mostly composed of granite.
This photo is looking up the canyon and if you were to keep going on the trail you would end up in the backcountry of Yosemite. On the left you can see part of Mount Scowden, a little right of center is Shepherd Ridge, and on the right is a subpeak of Mount Excelsior.