Giant's kettle

Water, produced by the thawing of the ice and snow, forms streams on the surface of the glacier, which, having gathered into their courses a certain amount of morainic debris, finally flow down a crevasse as a swirling cascade or moulin.

After the ice departed the area, the giant's kettle formed as an empty shaft, or as a pipe filled with gravel, sand, or boulders.

[4] Giant's kettles are common in Germany (gletschertopf; glacier pot), Sweden (jättegryta), Finland (hiidenkirnu; hiisi's churn), and Moss Island in the United States.

[citation needed] The Brobacka Nature Reserve, located outside Alingsås between the lakes Mjörn and Anten, contains one of the country's most impressive areas with giant's kettles, boasting around forty excavations, where the largest one, with its 18 meter diameter, stands out.

The giant's kettles can be accessed via the Brobacka Nature Center, and the location offers views over Lake Mjörn.