Is Guarda one of the last places where you can find an irregular star-like fort?

Is it true that, in Portugal, Guarda is the only place where ski can be practised?

Is there in Guarda district an important geopark?

Including islands, is Serra da Estrela, located mostly in Guarda, the highest mountain in Portugal?

Is Guarda the least populated district in Portugal?

Is any part of our district in the border with Spain?