Alexander Rose from the Long Now Foundation write about a recent visit to the LDS Geneology vaults at Granite Mountain outside of Salt Lake City. Wired Magazine did an extensive article on this in 1999.
Since I began working on the 10,000 Year Clock project, and associated Library projects here at Long Now almost a decade ago, I have heard cryptic references to this archive. We have visited the nuclear waste repositories, historical sites, and many other long term structures to look for inspiration. However we had never found a way to see this facility. This is the underground bunker where the Mormons keep their genealogical backup data, deep in the solid granite cliffs of Little Cottonwood Canyon, outside Salt Lake City. UT.
The Church has been collecting genealogical data from all the sources it can get its hands on, from all over the world, for over 100 years. They have become the largest such repository, and the data itself is open to anyone who uses their website, or comes to their buildings in downtown Salt Lake City.