Fredrikstad is an attractive city in the Østfold county. It's known for being the best-preserved fortified town in Northern Europe. The beautifully preserved 17th-century Gamlebyen (Old Town) is made nicer by being car-free making it easy to stroll the cobblestone streets lined with colorful wooden houses, watchtowers, and ramparts. The city museum offers a more in-depth experience for those who want to know more about the history. Those who want a more active time can take to the water and explore the 800 islands that make up the archepeligo.