The Pucará de Tilcara is a pre-Inca fortification or pukara located on a hill just outside the small town of Tilcara, in the Argentine province of Jujuy. The location was strategically chosen to be easily defensible and to provide good views over a long stretch of the Quebrada de Humahuaca.
The Pucará de Tilcara was declared a National Monument in 2000. It has been partially rebuilt, and is the only publicly accessible archaeological site in the Quebrada de Humahuaca.
Wikipedia https://en.wikipedia.org/wiki/Pucará_de_Tilcara
Coordinates -23°35'11.638" N -65°24'8.405" E