Yosemite is known for its famous glacial-carved granite monoliths (e.g. Half Dome). But when one pays attention, evidence of past glaciation is everywhere. Take, for instance, Tenaya Lake. It is surrounded on most sides by rounded granite peaks and hills that were carved and smoothed by glaciers. Even its shore bears signs of this glaciation—as the water recedes, it pools in dips carved by glaciers long ago, and it is dotted by “glacial erratics” (or granite boulders left behind by the glaciers).