The oldest known forest, fossil remains of tree-sized plants, today form a roadside attraction on Route 990V, just off Route 30 in Gilboa. The Gilboa Forest was discovered in 1850 when floodwaters turned up large fossilized tree trunks 380 million years old. That placed the fossils in the Middle Devonian Period of the Paleozoic Era, a time 150 million years, or so, before the Triassic Period, the era of the earliest dinosaurs.