About this sound Geilo is a centre in the municipality of Hol in Norway, in the valley of Hallingdal, with around 2,300 inhabitants. The Bergen Line facilitated Geilo's development as the first skiing resort in the country, and it is still one of the largest. It is also famous for having some of the most luxurious and expensive holiday cabins in Norway.Geilo is primarily a ski resort town, but also offers summer activities. Geilo is in a valley with mountain ranges on each side.