The Dog Arches are presented as a set of rock formations of volcanic origin located site Dog, parish of flags, Madalena municipality of Pico, Pico island.

These formations are composed of volcanic caves and lava tubes which together give rise to an appreciable mass of solidified lava clippings.

These formations extend the sea causing the strong eddies and whirlpools marine waters when it enters the tunnels and in volcanic caves.

Given its characteristics are encompassed in the protected landscape of Culture of the Pico Island Vineyard.