http://www.regjeringen.no/en/dep/lmd/campain/svalbard-global-seed-vault/history.html?id=489075 Svalbard Global Seed Vault lies about 1 kilometre from Longyearbyen  Airport as the crow flies, at about 130 metres above sea level and consists entirely of an underground facility, blasted out of the permafrost (at about minus 3-4 degrees Celsius). The facility is designed to have an almost “endless” lifetime.