Hornos de Lonquén, Historical monument in Talagante, Chile.

Hornos de Lonquén is a former lime-kiln site at the foot of Lonquén hill in Talagante, made up of two brick kilns. The kilns were dynamited in March 1980 by the new owner of the Lonquén estate, so what remains is the altered ground of the abandoned mine rather than intact structures. The 6.5-hectare area was acquired by the government in 2005.

On 30 November 1978, a commission from the Vicaría de la Solidaridad, led by Father Cristian Precht, found human remains in abandoned lime kilns here. Judge Adolfo Bañados confirmed they were fifteen peasants detained in Isla de Maipo on 7 October 1973. In 1979 the military justice applied the 1978 amnesty; in 1980 the kilns were dynamited.

The site is a place of pilgrimage for relatives of the fifteen peasants killed in 1973. In 2010, 14 of the 15 urns were handed over by the Legal Medical Service and taken to the Recoleta Franciscana church before a tribute and burial in a memorial at the Isla de Maipo cemetery.

The kilns stand at the foot of Lonquén hill, reached by road from Isla de Maipo. The site was dynamited in 1980, so the structures are ruined rather than intact; wear sturdy shoes for uneven ground. The 6.5-hectare area was acquired by the state in 2005.

In March 1980, the new owner of the Lonquén estate dynamited the kilns, erasing the structure that had become a pilgrimage site for relatives of the fifteen victims. The remains found in 1978 had been secretly removed from the Legal Medical Service and buried in a common grave in Isla de Maipo's municipal cemetery.