What marine vessels navigated in the swamp where Trelleborg is located?
Trelleborg (Slagelse) The Trelleborg (or Trælleborg) west of Slagelse on the Danish island of Zealand, is one of seven Viking ring castles discovered as of 2014. In its day, the fortress was situated on a peninsula that jutted into the swampy area between two rivers. The swamp was connected to the Great Belt by a lake that at its time could be navigated by Viking ships. Trelleborg is believed to have been ordered by King Harald Bluetooth in the year 980 AD and it might have commanded the Great Belt and its sea traffic, between the islands of Zealand and Funen.
Honey Island Swamp The Honey Island Swamp (French: "Marais de l'Île-de-Miel" ) is a marshland located in the eastern portion of the U.S. state of Louisiana in St. Tammany Parish. Honey Island earned its name because of the honeybees once seen on a nearby isle. The swamp is bordered on the north by U.S. 11, on the south by Lake Borgne, on the east by the Pearl River and the west by the West Pearl River.