Dune lakes and Croatian gum-digging trenches, Onepu Block, south of Parengarenga Harbour

The parallel lines at bottom are face-dug trenches each about 50-150 m long and 4 m wide. They were probably dug by Croatians in the 1930s. Taumatawhana is one of the two pre-European pā on the small hills north of the lakelets. Both pā have distinctive twin rectangular platforms, with outer perimeters of ditch and bank or scarp.