Tucked away in a mountain located on the Svalbard archipelago in Norway, also home to The Northmost Town on Earth, is the Svalbard Global Seed Vault. The Vault is home to more than 860,000 plant seed samples deposited by dozens of different countries from around the world (even North Korea) and is closed to access about 350 days per year. But the folks from Veritasium were able to finagle a tour of the facility during one of its rare open days.
This facility was built to last about 200 years and withstand earthquakes and explosions. It was placed on the side of a mountain so even if all the ice on Earth melts, it will still be above sea level.
Other fun facts about the Vault: the temperature in the storage rooms are kept at minus 0.4 degrees Fahrenheit to hinder seed growth/deterioration, the permafrost in which the Vault is built will maintain the low storage temp in case of electrical failure, GMO seeds are forbidden due to Norwegian law, and the first withdrawal was made last year by Syria because of the civil war.