"Ominous name aside, this swimming hole off the Roaring Fork River near Aspen is a blessing on a sweltering summer day. The ice-cool pool is accessible between late May and October, but best visited in June, July, and August, when its cyan pools are at their highest water levels. The hole is unmarked but can be reached by parking between mile markers 50 and 51 on Highway 82, a.k.a. Independence Pass, a thrilling scenic route about 10 miles east of Aspen. Hike down about 200 feet and you’ll know you’ve found the spot when you see cliff jumpers flinging themselves off the 10-, 18-, and even 25-foot boulders flanking a thunderous waterfall."