These engineering belongs to a preceramic period and consists of small stone-lined canals that drew water from uphill streams in the Andes Mountains.
In November 2019, Peruvian archaeologists led by Walter Alva discovered a 3,000-year-old, 130 feet long megalithic temple with 21 tombs in the Oyotún district of the valley.
The second phase was between 800 BC-400 BC when the megalithic temple was built under the influence of the pre-Inca civilization known as the Chavín culture.
Finally, a third phase was during 400 BC-100 BC when people added circular pillars used to hold up the roof of the temple.
[3] In June 2024, archaeologists from the Field Museum, Chicago under the leadership of Luis Muro Ynoñán discovered a 4,000-year-old temple at La Otra Banda site in the Saña district.
The temple walls were decorated with intricate images of figures with human bodies, bird heads, and reptilian claws.