Reykjavik is where almost every Iceland trip starts and ends, but Akureyri, the country's northern capital, is the natural base for a very different half of Iceland — closer to whale-watching waters and the best northern lights viewing.
Reykjavik's Hallgrímskirkja Church dominates the skyline and the Downtown 101 district has Iceland's only real concentration of restaurants, bars, and shopping on Laugavegur Shopping Street. Akureyri's own Akureyrarkirkja (Akureyri Church) is a smaller-scale echo of Reykjavik's, reflecting a much smaller town of around 20,000 people.
Reykjavik has the country's major cultural institutions, including the National Museum of Iceland, along with public art like the Sun Voyager (Sólfar) sculpture along the harbor. Akureyri's cultural offering is much thinner, with the town's appeal resting almost entirely on its setting and access to nature rather than museums.
This is Akureyri's real strength: it sits at the base of Eyjafjörður fjord, making it the best launch point for Whale Watching Tours, and its inland position gives excellent, lower-light-pollution access for Northern Lights Tours and trips out to Mývatn Lake. Reykjavik can offer similar tours but with more driving involved to reach the same nature.
Reykjavik is Iceland's only real city, with the country's main international airport at Keflavík, most hotels, and virtually all nightlife. Akureyri is a small town best reached by a 45-minute domestic flight or a scenic but long drive north, and works best as a two- or three-day extension rather than a first stop.
Choose Reykjavik as your base for a first Iceland trip — it has the airport, the city sights, and the widest range of day tours. Choose Akureyri as an add-on for whale watching, quieter northern lights viewing, and access to Iceland's north away from the Golden Circle crowds. Most itineraries use Reykjavik as the anchor and fly north to Akureyri only with extra time.