The locality and rural community of El Mollar is located in the Tafí del Valle Department, in the west of the Argentine province of Tucumán.

The settlement of El Mollar is located almost in the centre of the Tafí valley, beneath the slopes of the Cerro Ñuñorco hill, and beside the artificial lake of Angostura.

These menhirs, according to archaeologists, could have been used as astronomical measuring instruments, solar clocks, or as a symbol of some social or religious hierarchy.

They measure up to reach 3m in height and 60 cm breadth, and on some of them one face bears carvings with symbolic designs, snakes and human figures.

Very close to El Mollar, and extending towards Tafí del Valle, is the artificial lake of Angostura.