Cape Schanck, or Tunnahan (Boonwurrung) is a locality at the southernmost tip of the Mornington Peninsula in Melbourne, Victoria, Australia, approximately 72 km (45 mi) south of Melbourne's Central Business District, located within the Shire of Mornington Peninsula local government area.

A keen artist–traveller in the Romantic tradition, Nicholas Chevalier concentrated on effects of atmosphere, mood and dramatic lighting in his depictions of the iconic natural wonders he found at Cape Schanck.

Nicolas Baudin called it Cap Richelieu when he sailed past on the Géographe on 30 March 1802.

are occasionally spotted off the cliffs as are short-tailed shearwaters (particularly during their spring migration), black-faced and pied cormorants, kelp gulls and Australasian gannets.

The shrubs decorating the area are frequently home to brown thornbills, singing honeyeaters and a number of other passerines.