Between 5-6 million tourists visit Norway each year, with plenty of those spending some time in Oslo, either with the sole purpose of visiting the capital or using it as a transport hub to head to another part of the country. Despite being home to 700,000 residents, Oslo has plenty to offer, and the ideal amount of time to spend in the city would be three or four days (two would also suffice). Just a stone's throw from Oslo Central Station is the Oslo Opera House.