Your four-hour excursion takes you along the scenic coast of Geographe Bay before journeying inland to 500,000-year-old Ngilgi Cave (pronounced Neelgee). According to ancient legend, the cave is named after a good spirit named Ngilgi who triumphed over an evil spirit named Wolgine. Step into this subterranean world and you'll see a stunning wonderland of stalactite, stalagmite, helictite and shawl formations. To learn more about the cave and its history be sure to visit the nearby interpretive center. Back on the coach, you'll return to Busselton. En route, you'll stop at the famed Cape Naturaliste Lighthouse, which marks the northern tip of Leeuwin-Naturaliste National Park. Peering out over Geographe Bay at 403-feet above sea level, it was activated in 1904 and is a 66-foot-tall cylindrical tower built from limestone which was quarried from nearby Bunker Bay. Your visit to the Cape Naturaliste Lighthouse includes a walk around the base of the structure. You are also welcome to make your way down the short path that leads from the Lighthouse for superb views of the stunning coastline.