The best areas to stay in Oslo are Frogner and the city centre, particularly around Karl Johans gate.Frogner is an elegant residential area, known for its grand buildings, green spaces, and high-end boutiques. It's home to the famous Vigeland Park, a large sculpture park, and the popular Frogner Park, great for a leisurely stroll. The streets are generally calm, and you'll find a good selection of quality restaurants and independent shops, particularly along Bygdøy allé.For couples, Frogner offers a sophisticated and relaxed base. It's well-connected by public transport to the city centre, allowing for easy exploration during the day, while providing a more tranquil setting in the evenings. The area's upscale feel and proximity to cultural attractions make it ideal for a refined getaway.The city centre, especially the area surrounding Karl Johans gate, is the bustling heart of Oslo. This main street stretches from the Central Station to the Royal Palace, passing by significant landmarks like the Parliament and the National Theatre. It's incredibly convenient for sightseeing, with most major attractions, shops, and restaurants within easy walking distance.For solo travellers, staying in the city centre offers unparalleled convenience and access to everything. You'll be close to transport links for exploring further afield, and there's always something happening, from street performers to a wide choice of dining options.