Take a step back in time and have a peek at our prehistoric past with these sites around Ipswich... Denmark HillFossils were first discovered at the Denmark Hill Conservation Area as early as the 1890s.   In the 1920s eight tonnes of material was sent by train to the University of Queensland and thousands of fossils were uncovered dating right back to the Triassic Age more than 200 million years ago.Follow the Triassic Circuit, a 200-metre walking track, kids will enjoy this circuit, there are barbeques, a playground, toilets, picnic settings and sealed walking paths through the park.