The Dolmen of Cunha Baixa (Portuguese: Anta de Cunha Baixa) is a dolmen in the parish of Cunha Baixa, in the municipality of Mangualde, district of Viseu, Portugal. Cunha Baixa comprises a main chamber and corridor, although there are no remnants of body within its chamber. The dolmen, is a large polygonal shape enclosure, covered by a great slab of rock, of similarly large dimensions. This main chamber is 3 m wide, and 3.2 m high, formed from 9 vertical slabs, some fractured or incomplete. The entrance rock is parallel to the main stone and inclined towards the interior. The roof-stone is a long rounded rectangular slab, 4.5 m in diameter.