Nearly a thousand years ago, Inca masons fit this 12-angled stone

Twelve-Angled Stone: an example of perfectionist Incan architecture : r/interestingasfuck

March, 2013

Precision Fitting of Massive INCAN Blocks…

Inca architecture - Wikipedia

Machu Picchu architecture: The buildings of the Incas explained

Nearly a thousand years ago, Inca masons fit this 12-angled stone into a wall using no mortar : r/pics

Stonemasonry - Wikipedia

7 Ancient Sites Some People Think Were Built by Aliens

Machu Picchu - Wikipedia

Shimmering Foundation: The Twelve-Angled Stone of Inca Cusco

The twelve-angled stone in Cuzco, Peru. The stone illustrates the great precision Inca masons employed in ensuring their stone blocks fitted so well together that no mortar was needed. : r/interestingasfuck