The Pajarillo Footprint (1986)
On January 9, 1986, near the town of Capilla del Monte in Argentina's Córdoba province, residents reported seeing a luminous object flying over Mount Pajarillo. The next morning, a perfectly clean circular mark over 100 meters in diameter was discovered on the mountainside, immediately nicknamed "la Huella del Pajarillo" (the Pajarillo Footprint).
Witnesses
local residents
Why it endures
A massive physical trace, photographed immediately, that has since become a major ufological pilgrimage site in South America.
Official version (contested)
No official geological study has ever explained the perfectly circular formation or its apparent connection to the luminous sighting reported the night before.