Journey underneath Parliament House with an expert geologist from Geoscience Australia this National Science Week. On the tour, you’ll explore a geological phenomenon called 'Unconformity'. This ancient rock formation is a fascinating puzzle piece which helps to understand the earth in the Canberra region 430 million years ago. Don't miss this rare opportunity to see a geological formation where two rock masses, made millions of years apart, fused together. If you’ve been to Parliament House but never ventured underneath it, this tour is for you.