- Nuraghe of Voes (Plans and Sections).
The shores are so extensively indented with voes, or firths - the result partly of denudation and partly caused by glaciers - that no spot in Shetland is more than 3 m.
The lochs and tarns are well stocked with brown trout, and the voes and gios, or narrow inlets of the sea with steep rocks on both sides, abound with sea trout.
The parish of Walls, in the west, is said to contain more voes, whence its name (an erroneous rendering of the Norse waas), than all the rest of Shetland; while the neck of land at Mavis Grind (Norse, maev, narrow; eid, isthmus;.
Yell (2483), separated from the north-east coast of Mainland by Yell Sound, is the second largest island of the group, having a length of 17 m., and an extreme width of 62 m., though towards the middle the voes of Mid Yell and Whale Firth almost divide it into two.