Puka Pukara, Archaeological site in Cusco Province, Peru.

Puka Pukara is a military ruin of large, irregularly stacked stone walls, terraces and staircases on a slope about 7 km from Cusco, on the road to Pisac. The walls step down the hillside in several levels, with a flat grassy platform at the top and rectangular enclosures below; a curved wall section stands on the lower left. Patches of grass and shrubs grow between the grey and brown stones.

The site was built during Pachacutec's reign as a military outpost and garrison for soldiers guarding trade and travel routes. This defensive role made it a key checkpoint between Cusco and the Sacred Valley.

The Quechua name Puka Pukara means "red fortress", from puka (red) and pukara (fortress); the grey limestone walls hold iron and may once have looked red. Besides its military role, the site served as an administrative center, with terraces, staircases and passages. Area residents set up tables at the ruins selling small souvenirs or offering to photograph groups for a few soles.

The ruins stand on high ground about 7 km from Cusco on the road to Pisac, overlooking the Cusco valley and Tambo Machay. Local people often set up tables at the site selling small souvenirs or offering to photograph groups for a few soles. The walls are reached by walking up the slope; the stone enclosures and terraces step down the hillside in several levels.

The walls are cleverly positioned to incorporate large natural rock outcrops into the structure, creating both defensive and structural advantages. This adaptation shows how builders worked with the uneven terrain rather than fighting against it.