Great bulls loomed from the darkness, herds of horses cantered across the cave walls, reindeer reared their antlered heads, seeming to shift and stir in the flickering lamp-light.

BBC: The perfect trip: Dordogne

Since reindeer need to be fed less meat than dogs, locals used the antlered animals to pull their skis and sleds from the 14th Century onward.

BBC: Finland��s native S��mi adventures