I've seen ravens in other places, and we have them in Australia [where they are all but identical to the crows], but never had the chance to interact with them as I can in Olafsfjordur.
They can be seen often tagging each other in the air or as one sits somewhere, or playing as they glide around. The one pictured above was tumbling upside down, something I've seen them do quite often, seemingly just because they want to.
The range of sounds they make is remarkable. They have a normal call, squawking exclamation marks, but also make a range of sounds that seem like they are made by some kind of wooden wind chime. These can come singly or in rattling bursts. No doubt there is some reason for the different calls, but they are remarkable.
They seem to display a sense of humour regarding photography also. Numerous times I have been waiting somewhere to take a clear shot of them gliding or playing, only to eventually stop and move on as they remained just out of useful range, only to find one or two of them gliding up behind me only to disappear again in a blink, usually with a cheeky squawk as they go.