Mount Hood National Forest's Lost Lake is the cause of a natural phenomenon that has Oregon residents stumped. When winter comes, nearby rivers drain into the lake and make it fill with water. While this event isn't out of the ordinary, the lake does undergo a disturbing transformation in the spring.
As winter comes to a close, the lake drains like one huge bathtub. According to Willamette National Forest's spokeswoman Jude McHugh, the hole has always been there. As for its mysterious drainage, it's most likely caused by the region's porous volcanic landscape.