What is "lummelunda"

Lummelunda (sometimes referred to as Lummelunda and Etebols) is a settlement on the island of Gotland Sweden, approximately north of Visby. Formerly a socken, on 1January 2016, it was reconstituted into the administrative area Lummelunda District. It is a joint parish with Stenkyrka. Lummelunda is most noted for the Lummelunda Cave, one of the longest caves in Sweden, and the mill with the largest water wheel in northern Europe.