The Legend of the Poll na bPéist "Wormhole of Inis Mór"

Stargate Voyager

Inishmore is the largest of the Aran Islands of Galway Bay in Ireland and is an area consisting of 12 square miles. It is the largest island off the Irish coast with no bridge or causeway to the mainland. One of the most remarkable features of Inishmore island is the Poll na bPéist which translates as the "Serpent’s Lair," relating to the legend of a reptilian sea monster from Gaelic folklore. Most of the locals just refer to it as the Wormhole. This is likely the most unusual sight you’ll encounter if you ever explore Inishmore. It is truly considered one of Ireland’s top hidden gems, because what you will behold is what appears to be an almost perfectly cut giant rectangle into the limestone floor. Is the Wormhole of Inishmore just a natural wonder or is it an artificial creation of the ancients?

https://youtu.be/yX4qtLnmurs?si=4Pt7an9XMFLCEzDl