Strange bit of manmade geography in the UK: three drainage ditches running parallel to each other, connected on both ends, creating two inland islands that are almost 2 miles / 3 kilometers long but only 15 yards/meters wide. West of Scunthorpe.
It being industrial architecture of the UK, there is, of course, a long and boring wikipedia article about it. https://en.wikipedia.org/wiki/River_Torne_(England)
@wikkit If these were in Canada, they'd make excellent skating in the winter.
In Quebec, north of Trois-Rivieres they Zamboni 15 km of forest trails for skating.
https://www.domaineenchanteur.com/en/index.htm
Welcome to Domaine Enchanteur, located in the famous lost forest of Notre-Dame-du-Mont-Carmel, in the heart of the Mauricie region, 20 minutes from Trois-Rivières and Shawinigan. We offer a wide range of outdoor activities, summer and winter alike, to help you spend a memorable day in nature! Aerial course (suspended labyrinth), hebertism track, animal park, 15 km of skating trails in the forest, small animal rides, discovery of the world of bees, etc. Domaine Enchanteur
Ben Brockert
Bill Minarik