The Viera Dolmen

The Dolmen de Viera or Dolmen de los Hermanos Viera is a dolmen—a type of single-chamber megalithic tomb—located in Antequera, province of Málaga, Andalusia, Spain. It is located only 70 metres from the Dolmen de Menga and about 4 kilometres of another structure known as Tholos de El Romeral. It was discovered between 1903 and 1905 by brothers Antonio and José Viera from Antequera, who also discovered El Romeral.

Source: Wikipedia