For vel 7000 år sidan var Straume ein av dei beste – om ikkje den beste – veideplassen i Hordaland. Steinalderfolket som busette seg ved Skipshelleren, skjøna truleg ikkje kor heldige dei var. Mellom dei opptil 2 meter tjukke dyngjene med stein og bein som arkeologar grov fram i 1931–32, fann dei reiskapar og avfall frå fangst og matstell. Frå dette materialet har arkeologane stava seg fram til livet ved straumen.
Tthe Otterstad farms lie in the innermost part of Mofjorden, on the northwest side of the river. The row of stave-built boatsheds that belong to the farm were probably constructed a little after the middle of the 1800s. Both here and on the Mo side, the boatsheds were important storage places at the seashore; wood and other farm products intended for the town; corn and merchandise in return.
Furthest north in the island community Rongevær, at the entrance to Fensfjorden, lies Krossøy. Belonging to the farm are the islands of Krossøy, Husøy, Kårøy, Lyngkjerringa, Søre Kjerringa, Rotøy and Kuhovet. All of them have been inhabited. On Krossøy itself today there are four holdings. The marine use environment here is one of the best preserved along the West Norwegian coast.
The farmhouses at holding No. 15 at Hopland are built together to form a long, continuous building, with dwelling house, hayshed and cowshed built in one row. There have been many such joined structures in the coastal communities, but today there are few remaining. If we travel to the other side of the North Sea, to the Faeroes, Shetland and the Orkney Islands, we find corresponding features in the older building traditions. We find ourselves in a large North Atlantic cultural area.