Complex sentence: Artifacts from the Peninsula's pioneer and, to a lesser extent, indigenous heritage can be seen at a network of National Trust museums, which include the Mount Laura Homestead Museum in Whyalla, the Tumby Bay National Trust Museum and the Koppio Smithy Museum.
Split into simpler sentences: Artifacts from the Peninsula's pioneer and to a lesser extend, indigenous heritage can be seen at a network of National Trust museums. These including the Mount Laura Homestead Museum in Whyalla, the Tumby Bay National Trust Museum and the Koppio Smithy Museum.