If you come to Iceland, aside from the Northern Lights tour, this would be my top recommendation. It's truly worth spending a day experiencing. Our guide, Jay, was incredibly professional. In addition to hiking, he taught us how to climb and rappel on the glacier using ropes and ice axes! I brought my mother, who is almost 60, and he professionally designed different routes and methods for us, allowing us to experience climbing in various ways. On this tour, the guide will do their best to take you to the highest accessible point of the day, so you can admire the glacier from different perspectives!