Mount Kilimanjaro has a problem: acclimatisation. The old adage to avoid acute mountain sickness is that you should climb high, then sleep low. That’s not an issue in a peak-packed mountain range ...

The sport doesn’t just have physical benefits—it’s a mental game. “Rock climbing fires every system of the body and mind.” A man boulders to the top of the Aguille de Joshua Tree in Joshua Tree ...

Vertical Voyages takes students upward to sleep in the trees at John Burroughs School. This story first appeared in the Outdoors newsletter. Click here to learn more and sign up. Sometimes, Jon ...