It was discovered in 1892, by Leite de Vasconcelos, who first documented the dolmen, under the authority of Dr. Pais da Cunha, then owner of the property.

They proceeded to clean out the chambers and excavate to about 1.17 metres, discovering the first archaeological objects, and then continuing to the table rock.

In these excavations Leite de Vasconcelos found in the interior of the dolmen, axes and polished trapezoidal-shaped polished stone adzes; rudely carved flint blades, trapezoidal microliths, triangular and semi-lunar, fragments of red and black pottery, some with ornaments; yellow ochre for body painting; burnt berry seeds; burnt pieces of substances from a forge or furnace; and a human bone.

[1] Located along the municipal roadway connecting Cunha Baixa with Espinho, the site is 0.8 kilometres along a footpath to a bridge: 300 metres by foot between two properties in the locality of Orca, or Casa da Moura.

[1] It is situated in a rural, fertile plain alongside a river, isolated from view and encircled by vineyards to the south and east, and pine forests to north and northwest, delimited by a wood and wire fence.

[1] It is built from 8 vertical slabs on either side (a few reinforced by steel beams), forming side-walls that are wider in the mid-area and converge slightly towards the main chamber entrance.