Enigmatic Level “Level -5”(3)

作者信息：
概念的提出者为：Oracuda，由Dr Bierre重写。
译者：INSide_497
*"Snowy forest scene."，作者为Ranta Janne，遵守CC0 1.0协议。协议原文：https://creativecommons.org/licenses/cchttps://wimgs.ssjz8.com/upload/0/1.0/
https://www.flickr.com/photos/167351774@N07/39882965463
*"Front of the pillbox"，作者为Bill Nicholls，遵守CC BY-SA 2.0协议。协议原文：https://creativecommons.org/licenses/by-sa/2.0/

https://www.geograph.org.uk/photo/1675621