Fredrikstad is one of the best-preserved fortress towns in Scandinavia, sitting at the mouth of the Glomma river about 90 km south of Oslo. The Old Town — Gamlebyen — was built in the 17th century after the original town was burned by Swedish forces, and its ring of moats, earthen ramparts, and cobbled streets remains remarkably intact. People still live and work inside the old fortifications; a bakery, a café, and a handful of craft shops occupy buildings that have stood since the 1600s.
The main way to reach Gamlebyen from the modern town centre is by the small passenger ferry that crosses the Glomma — a five-minute ride that feels like stepping into a different century. The fortification system extends beyond the old town walls: Kongsten Fort stands on a hilltop to the east, and the small island of Isegran at the river mouth preserves medieval ruins and a boat museum.
Fredrikstad Cathedral and the Fredrikstad Museum add cultural weight to the modern town. The surrounding Oslofjord countryside and a day trip to Halden's dramatic Fredriksten fortress round out a stay of two or three days.