https://attheu.utah.edu/research/utahs-other-great-salt-lake-is-underground-ancient-deep-and-fresh/
Utah’s other Great Salt Lake is underground, ancient, deep and fresh – @theU
U researchers begin to characterize the mountain-derived groundwater extending thousands of feet below the playa.
great salt lakeutahancient
https://www.popsci.com/science/ancient-freezer-south-korea/
Ancient underground freezer unearthed at South Korean castle | Popular Science
Oct 16, 2025 - The 1,400-year-old ‘bingo’ is the oldest known facility of its kind.
ancient undergroundfreezer
https://somistinstitute.org/tag/ancient-underground-water/
ancient underground water - Somist Institute
ancient undergroundwater