North Iceland offers a rare combination of guided cold-water scuba at the protected Strytan and Arnarnesstrytan hydrothermal chimneys in Eyjafjordur and an operator-supported freshwater day circuit to Nesgja and Litla-A. Strytan Divecenter operates from Hjalteyri, using small boats and road transport rather than liveaboards. The chimneys require advanced planning, appropriate drysuit skills and the operator's protection briefing. The water circuit includes a cold freshwater fissure and a shallow geothermally warmed river, with separate scuba and snorkel options. Away from the water, Akureyri, Godafoss and Husavik make a strong mixed-group itinerary. Departures are described as year-round but weather dependent; prices, individual availability, freshwater access and water quality should be reconfirmed before booking. The operator also advertises a separate humpback whale-snorkeling outing, but its current operation, wildlife interaction rules and guest requirements have not been independently cleared.