We did a back-to-back circumnavigation of the Baltic Sea on the Orion and loved the experience so we decided the way to see Iceland was by circumnavigation. This trip was amazing and is at the top of my list of recommendations to friends. We did the heli-hiking extension and it was an "over-the-top" experience. I highly recommend this extension for anyone that wants to see Iceland from places many never venture to. You must be adventurous and able to hike on rough terrain. Our guide Gaddi Hrafn Sigurjonsson, from Asgard Beyond was fabulous. He took us on hikes and was there to encourage us to experience the wild beauty of Iceland. I will enclose a couple of photos from our lunch on the top of a mountain and hiking across the glacier. We talked to a number of guests on the ship about taking the extension, and the feedback was it was too expensive. I would say yes, expensive, but a once in a lifetime experience, well worth every penny. I think Nat Geo and Lindbland could do a better job of marketing this heli-hiking adventure.