Walking the trail path in the Greene Valley Forest Preserve, you may encounter a wide range of nature and come across a little part of history. Bonnie Olszewski, public affairs specialist for the DuPage County Forest Preserve District, said the Greene Farm Barn was established at the preserve to benefit the community for educational, historical and cultural purposes. “It ties to the history of our community, a piece of the past preserved that reminds future generations of those who came before them,” Olszewski said. “It may also bring the repurposing of a once empty building to a public space…