Yanchep National Park, Nature reserve in Perth region, Australia.

Yanchep National Park is a 28 km² national park 42 km north of Perth, established in 1957. It contains over 570 caves formed by underground streams in Tamala Limestone, plus wetlands around Loch McNess and woodland of tuart, marri and banksia. A 140-metre koala boardwalk gives close views of the park's koala colony.

The park's recorded history begins in 1834, when farmer John Butler searched for lost cattle and noted the lakes, wetlands and plentiful game, meeting men of the Yellagonga peoples. Lieutenant George Grey passed through in 1838 and described the caves, and surveyor John Septimus Roe with Governor John Hutt visited them in 1841. Henry White settled in 1901 and became caretaker and guide in 1903; the national park was established in 1957.

The Wangi Mia Meeting Place shows how the Noongar people connected with this land through ceremonies and knowledge of plants and animals passed down over generations. Visitors today can witness traditional dances and hear stories about the country that shaped their culture.

The nine walking trails range from short strolls to longer hikes and suit different fitness levels and time available. Wear good footwear and bring plenty of water, especially on warm days when exploring the park.

Crystal Cave was discovered in 1903 and remains the only show cave near Perth, featuring striking limestone sculptures beneath the ground. Guided tours run multiple times daily, allowing visitors to walk through these underground chambers and see the formations up close.