Dolmen de Viera is situated in a huge mound next to Dolmen de Menga. The entrance is restored, but you pass some of the original stones before you come to the old part of the structure. It is a long passage leading to a very small chamber, which is illuminated at the autumn solstices by the sunlight at daybreak.

I suppose that the ironbar was placed in front of the inner chamber to prevent people from entering.