In the mountain ranges of Oregon, a there is a shallow lake just off the highway, which vanishes annually during the dry summer months after that resurfaces during the wetter months. It is called Lost Lake, and its magical disappearing act is as a result of a lava tube.
These geographic features develop when streaming lava cools and hardens at the top while the hot insides underneath the surface keep flowing downhill. The tunnel that is left behind might open up a hole after an eruption or even through erosion. Lava tubes which range from trash-can-sized small guys to subway-tunnel-sized ones you can walk through are spread across the volcanic landscape of Central Oregon along with the Cascade Range.
Multiple small streams flow into the 0.13-square-mile Lost Lake, and they all drain into one (perhaps two) of these massive holes on the north side of the lake. Water begins pouring in during the late fall, and it goes on all through the snowstorms and rain “It fills up in the winter when input surpasses the rate of draining after which it runs dry and it’s a field,” Willamette National Forest spokeswoman Jude McHugh says. The hole has been there for as long as anybody can remember.
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