'Doomsday' seed vault invites the public inside

Jutting out of the permafrost on a Spitsbergen mountainside in the Svalbard archipelago, the entrance to the world's "doomsday" seed vault is worthy of a James Bond movie.

- Patrick Greenfield

Surrounded by snow, ice and the occasional polar bear, the facility houses 1.2m seed samples from every corner of the planet as an insurance policy against catastrophe. It is a monument to 12,000 years of human agriculture that aims to prevent the permanent loss of crop species after war, natural disaster or pandemic.

The Global Seed Vault in the Norwegian Arctic, which opened in 2008, is closed to the public, shrouded in mystery and the subject of conspiracy theories. Now, to celebrate the vault's 15th anniversary, everyone is invited on a virtual tour to see inside the vast collection of tubers, rice, grains and other seeds buried deep in the mountain behind five sets of metal doors.