Every summer, Oregon’s Lost Lake disappears down a couple of volcanic tunnels only to return in the fall, as a number of streams start flowing into what looks like a peaceful meadow.

Driving past Lost Lake in the late fall or in the winter, you may not pay much attention to the seemingly plain body of water, but making the same drive in late spring or in the summer, you’ll definitely do a double take as a peaceful meadow replaces the lake. This is the magic of Lost Lake, a special attraction located in Oregon’s Willamette National Forest, just off U.S. Highway 20. Starting in late autumn, a number of streams start flowing down from the surrounding mountains filling the meadow that soon becomes the bottom of the Lost Lake, and by mid-winter, the lake is at its fullest. The disappearing act begins in spring and is completed in the summer, as the contributing streams dry out, and all the water in the lake is drained via two holes that act like the drains of a bathtub.