Prehistoric Petroglyphs (Rock Carvings) at Alta, Northern Norway:

Text from the UNESCO site, October 2012:

Brief Description

This group of petroglyphs in the Alta Fjord, near the Arctic Circle, bears
the traces of a settlement dating from c. 4200 to 500 B.C. The thousands
of paintings and engravings add to our understanding of the environment and
human activities on the fringes of the Far North in prehistoric times.

Our visit to Alta

Prehistoric Petroglyphs (Rock Carvings) at Nämforsen, Ångermanland (Northern Sweden):

Information at Nämforsen, July 2012:

Map at Nämforsen:

Our visit at Nämforsen