Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Þingvellir National Park' has mentioned 'River' in the following places:
Occurrence Sentence Text Source
From the earliest times until the 15th century, the Law Council met at Nexc3xb0ri-Vellir on the east bank of xc3x96xarxc3xa1, but when the river changed its course around 1500, the council was moved to an islet in the river.
The river xc3x96xarxc3xa1 traverses the national park and forms a waterfall at the Almannagjxc3xa1, called xc3x96xarxc3xa1rfoss.