Varva was a fictional place located in Reidgotaland

Reidgotaland

Reidgotaland, Hreidgotaland or Hreiðgotaland was a land in Scandinavian sagas as well as in the pre-Viking English Widsith, which usually referred to the land of the Goths...

. It appears in Heimskringla

Heimskringla

Heimskringla is the best known of the Old Norse kings' sagas. It was written in Old Norse in Iceland by the poet and historian Snorri Sturluson ca. 1230...

, where it is told that the Swedish king Dag the Wise

Dag the Wise

Dag the Wise or Dagr Spaka was a mythological Swedish king of the House of Ynglings. He was the son of Dyggvi, the former king. According to legend, he could understand the speech of birds and had a sparrow that gathered news for him from many lands...

's sparrow

Sparrow

The sparrows are a family of small passerine birds, Passeridae. They are also known as true sparrows, or Old World sparrows, names also used for a genus of the family, Passer...

 was killed by a farmer

Farmer

A farmer is a person engaged in agriculture, who raises living organisms for food or raw materials, generally including livestock husbandry and growing crops, such as produce and grain...

 in Varva. Because of this, Varva was laid waste by the Swedes.

If Varva has ever existed in reality, it might have been situated at the estuary of the Vistula

Vistula

The Vistula is the longest and the most important river in Poland, at 1,047 km in length. The watershed area of the Vistula is , of which lies within Poland ....

, where the Goths

Goths

The Goths were an East Germanic tribe of Scandinavian origin whose two branches, the Visigoths and the Ostrogoths, played an important role in the fall of the Roman Empire and the emergence of Medieval Europe....

were settled at the time of Dag the Wise.