Ukonkivi ("Ukko's rock") is located on the island of Ukonsaari in lake Inari, Finnish Lapland.
Ukonkivi was considered by the local Inari Sami to be an extremely important sieidi (Inari Sami: siejdi, Finnish: seita), or sacred natural formation, and was used as a sacrificial site, perhaps as recently as in the 19th century.
[1] The names "Ukko" and "Äijih" refer to sky deities in the Finnish and Sami mythologies, respectively.
One of the most important archaeological findings in Lapland[citation needed] was made at Ukonkivi in 1873 by the British archaeologist Sir Arthur Evans, when a silver jewellery fragment was found in the cave.
[1] The names of some of the numerous islands adjacent to Ukonsaari may suggest other religious sites, for example: