Fredericia is a fortified town on the eastern coast of the Jutland peninsula in Denmark, built from scratch in the 17th century as a planned military stronghold. King Frederick III founded it in 1650 — hence the name — and laid it out on a strict grid plan enclosed by star-shaped ramparts. Those ramparts are still intact, forming a green ring around the old town that residents use for walking and cycling.
The town has a significance in Danish military history beyond its architecture: in 1849, during the First Schleswig War, a Danish sortie from the town's gates defeated a vastly larger Schleswig-Holstein force in what became known as the Battle of Fredericia. The Land Soldier statue on the main square commemorates the fallen.
Fredericia is also one of Denmark's main rail and road junctions — the point where traffic between Copenhagen and the rest of the country crosses to and from the Jutland peninsula. That means trains stop here, and the rampart park makes it worth a brief stopover even if you're just passing through.