Lake Toya (Hokkaido)

Even in winters that plummet well below freezing point, Lake Toya never ices over.
The near-circular lake is the remains of a volcanic eruption that hollowed out the ground.
Mount Usu lies on the southern rim of the lake and Nakajima Island sits at the center.
Shikotsu-Toya National Park, Toyako, Hokkaido, Japan; +81 142 75 2555