Willoughby Lake North Beach, Vermont

Willoughby Lake was carved out of northeast Vermont by a glacier several million years ago and hasn't gotten much warmer since. Still, hanging out at the edge of this 320-foot-deep, tree-lined oasis is incredibly peaceful when the sound of locals shouting as they jump off nearby Devil's Rock doesn't echo off towering Mount Pisgah. Along the lake's eastern edge, there are natural waterslides, but most locals stick to North Beach and stay out of the water lest they encounter the local sea monster named Willy or hypothermia.