With only one entry and exit point, going below the ice can be dangerous, but it's worth it. Ice diving transports you to a totally different world, one with crystal-clear water and alien marine life. Getting ready requires training beyond a regular certification—go to padi.com to find a course. Then visit our favorite location: Banff National Park in the Canadian Rockies.
- Editor Obsession: Shoes We LoveOur editors' picks for the best shoes for the coming season.
- Six Spirits That Will Save Your Holiday SeasonThey're key to any holiday gathering.
- 8 Holiday Cocktails Made with MoonshineMust-try recipes from America's most visited distillery.
- Form CheckThe easy reminders for five basic lifts.