There's probably nothing particularly strange about the base. It's just good to note that some countries in Europe have bases censored, depending on the source of that image. For instance, the Spanish naval base at Cartagena is censored in the aerial imagery, so that Google trimmed the censored image and left the uncensored satellite image of the base. It's a common thing in The Netherlands and several French bases are also censored. What throws people is that the censoring isn't steady.
Also, if you're using Google Earth you can move the time slider and the censor block will disappear so that you can see the base.