"Some info about Sarpsborg, Halden, Fredrikstad..." Sarpsborg by sudenko

HALDEN (10 km): http://www.visithalden.com/indexeng.html
Halden is a beautifull town, located between Oslo and Gothenburg. The first thing you will see when arriving Halden is the guest marina in the centre if the town at he foot of Fredriksten fortress. I Fredriksten fortress is the site of some of the most dramatic events in Norwegian history. Halden used to be the frontier post in Norway, and has now become the gateway to Norway.

FREDRIKSRAD (20 km): http://www.opplevfredrikstad.com/of05/uk/default.asp
The best preserved fortress town in the nordic countries is both vivid, charming and very interesting. Fredrikstad has more to offer than going for a stroll on the ramparts. For those who dare..

SARPSBORG: http://www.visitsarpsborg.no/?menutop=501
The Bjornstadskipet is probably the largest rock carving in Northern Europe; The Alvim Field Alvim-Felsbilder Alvim-helleristningene contains some of the most recently discovered rock carvings; Borgarsyssel Museum is the county museum of Ostfold; The Sornes Clock is The World’s most complicated timepiece can be seen in Borgarsyssel Museum in Sarpsborg; Kules Park is flott, skogakmagnificent, wooded park in the centre of town, adjacent to the town hall; Hafslund Manor and Gallery are situated by the Sarpsfossen waterfalls and is one of the few remaining Norwegian stately homes from the 17th and 18th centuries; The Roald Amundsen Centre. Roald Amundsen was born in Hvidsten, between Sarpsborg and Fredrikstad in 1872. And much more...