Piggabeen and its valley are part of the Tweed Shield Volcano and Caldera that is the largest erosion caldera in the southern hemisphere , with Mount Warning being the extinct volcano .
Piggabeen has a valley that leads northwest towards the Queensland border .
Piggabeen and Piggabeen 's valley Piggabeen part of the Tweed Shield Volcano and Caldera that is the largest erosion caldera in the southern hemisphere , with Mount Warning being the extinct volcano .
Piggabeen has a valley that leads northwest towards the Queensland border .