Royal Observer Corps 20 Group Headquarters is the formal description of the semi-submerged nuclear bunker in Holgate, York, now owned by English Heritage and open to the public for the first time as from 2006.
The York bunker was opened on 16 December 1961 in the grounds of a large Edwardian property used over the years by a variety of Government agencies. It was originally operated by the Royal Observer Corps and was the regional reporting centre for a cluster of sub-bunkers which, in the event of war, would have gathered data on nuclear explosions and radioactivity levels. About 60 people could be accommodated for two weeks in airtight and bombproof conditions. The bunker was put on top alert in 1962 during the Cuban Missile crisis, but was eventually abandoned in 1991 after the signing of a non-aggression treaty with the Warsaw Pact countries. The bunker became a scheduled ancient monument a few years later and has now been preserved and made accessible to the public.
Tours last 1 hour, last tour at 3pm
Full adult tickets are £10 but English Heritage members go free.