Cracroft Caverns

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Cracroft Caverns, also known as the Cashmere Caverns, are a series of large chambers in the hill of the Cashmere suburb of Christchurch, New Zealand. Constructed secretly during the Second World War in response to the Japanese threat, they were intended to house operational headquarters in the event of attack. The military commandeered the Cracroft Wilson estate, founded by Sir John Cracroft Wilson in 1854, for their Southern Group headquarters, and work on the tunnels began in 1942. Railways were built for access and for the removal of waste soil. The largest cavern was 7 metres high, 10 metres wide and 30 metres long. Prestressed concrete was used to line the caverns. Officers based in the estate house would come down stairs into the tunnels, while others were to enter through the access tunnels. Construction came to a sudden halt in 1944 as the threat of invasion receded, even though work on the bunkers was nearly complete. The weekend before the military left the estate, fire broke...

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