World War II plan for secret inland airfields shows how Australia was preparing to defend itself - ABC News
![World War 2: Five top secret British intelligence bases hidden in houses across UK MAPPED | UK | News | Express.co.uk World War 2: Five top secret British intelligence bases hidden in houses across UK MAPPED | UK | News | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/1/750x445/1198738.jpg)
World War 2: Five top secret British intelligence bases hidden in houses across UK MAPPED | UK | News | Express.co.uk
![World War 2: Five top secret British intelligence bases hidden in houses across UK MAPPED | UK | News | Express.co.uk World War 2: Five top secret British intelligence bases hidden in houses across UK MAPPED | UK | News | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/1/590x/secondary/The-locations-were-revealed-today-2142445.jpg?r=1572679063233)
World War 2: Five top secret British intelligence bases hidden in houses across UK MAPPED | UK | News | Express.co.uk
![Beavertail's Top Secret Spraycliff Observatory During World War II - Online Review of Rhode Island History Beavertail's Top Secret Spraycliff Observatory During World War II - Online Review of Rhode Island History](http://smallstatebighistory.com/wp-content/uploads/2017/07/Spraycliff-1.jpg)
Beavertail's Top Secret Spraycliff Observatory During World War II - Online Review of Rhode Island History
![Huge fort used as a secret WW2 base on sale for LESS than price of London parking space - Mirror Online Huge fort used as a secret WW2 base on sale for LESS than price of London parking space - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article29439684.ece/ALTERNATES/n615/0_JRR_WOL_070223_FORTHUBBERSTONE_02jpeg.jpg)