This series of dry limestone caves was 'discovered' in the 1880s by a horse named Kelly, who fell into them through a hole. Take the standard show cave tour (10.30am, then hourly 11am to 4pm), or add on an adventure caving tour (2.15pm; bookings essential). The Hanson Bay Walk (9km one way) runs from the caves past freshwater wetlands. There are extra show cave tours during school holidays.
Kelly Hill Conservation Park
Kangaroo Island