The Buraco do Inferno sits on the western, ocean-facing coast of Ons, where the Atlantic hits the island with nothing between it and Newfoundland to slow it down. The approach follows a cliff path south from the village, past the point where the walking trail turns inland; continue along the edge until the ground opens up.
At its most dramatic in a south-westerly swell — the low, steady Atlantic kind that rolls in without breaking until it hits land — when the noise from below is deep and rhythmic and the spray occasionally reaches the surface. In flat calm it is merely a hole in the ground with a view. Check conditions before planning a visit if the spectacle is the point.