Eganville is an unincorporated community within a deep limestone valley carved at the Fifth Chute of the Bonnechere River in Renfrew County, Ontario, Canada. Eganville lies within the Township of Bonnechere Valley.
Eganville is known as the Ordovician Fossil Capital of Canada. There are many fossils to be found in this area from approximately 500 million years ago (in a time before dinosaurs) including coral, crinoids, trilobites, cephalopods, gastropods, pelecypods, stromatolites, and brachiopods. The Bonnechere Valley is also a gateway to some of north-eastern Ontario's best-known tourist destinations, including the nearby Bonnechere Caves. The caves are located under a hill of limestone, said by geologists to have been the bottom of a tropical sea 500 million years ago. The Bonnechere Museum, through a partnership with the Bonnechere Caves, offers fossil hunts four times in a summer season where people can practice finding fossils and even take one home if they find a good one. Eganville is also home to a Geo-Heritage Walking Trail located along the Bonnechere River which features a fossil pit, a visit to an old quarry, a trench, wild plants, and scenic lookouts.