Protected house

I have enjoyed the past days the Spanish friendliness. First I got invited to a party of one friend of a friend in the same day I met her. Then I spent nice day in a house of a friend. I noticed that Spanish private houses are very well protected compared to Finnish ones. In Spain houses have a high fence surrounding the house with a door that you cannot enter without permission. Then all the windows had bars The final thing to secure the security was a alarm system what recognizes movement in the house.