The world is still full of terra incognita, and a lot of it will remain unknown, at least for a while. But it’s a thrill to see just a slice of it, imagining you’re the very first person to lay eyes on one particularly magnificent bit of Planet Earth.

This voyage has been like that. Sailing into the remotest reaches of South America, on Ultramarine, a purpose-built luxury expedition ship, we’ve navigated through a land of jagged peaks and forbidding glaciers, super-cold waters, and narrow fjords. Places that keep their secrets close.