Visit the iconic Hallgrímskirkja church (tower open ~9:00am–5:30pm) for panoramic views, then stroll the nearby streets (Laugavegur) and Harpa Concert Hall on the waterfront.
Pick up your rental car in Reykjavík or at the airport and buy snacks/fuel for the south-coast drive; most rental desks open early (check your provider).
Join a guided northern lights tour (departure ~9–11pm) or drive out of the city to a dark spot and monitor the aurora & cloud forecast — guided tours usually cost more but provide aurora expertise and photography help.
Walk between the tectonic plates and visit the historic Alþingi site; park grounds are open 24/7 but visitor center hours vary (typically ~9:00am–5:00pm).
Choose a 45–60 minute walk to the famous plane wreck (open 24/7 but exposed) or visit Dyrhólaey viewpoint for puffin/arch views (seasonal closures in summer; accessible in October).
Vík’s remote location gives excellent aurora potential; join a local guide starting ~9–11pm or head to Reynisfjara/ Dyrhólaey for dark skies (watch for tides and hazards).
If available and booked in advance, take a close-up zodiac or amphibian boat among the icebergs (operators typically run daytime tours and require booking).
Large dark skies around the lagoon make for excellent aurora viewing when cloud cover is low — bring tripod and warm clothing; parking areas are open 24/7.
Relax in the milky-blue geothermal waters; Blue Lagoon usually operates early morning to late evening (typical slots 7:00am–10:00pm) and requires advance reservation.
Enjoy a final Icelandic dinner in Reykjavík — options include tapas-style seafood or modern-Nordic tasting menus; many restaurants open 5:00pm–10:00pm.
If skies are clear, head slightly away from city lights (e.g., Reykjanes Peninsula lookouts) for one last aurora attempt before departure; check aurora and cloud forecasts.