One thing that surprised me was freezing my ass off in Spain, during winter. Cold as hell!
I used to ridicule them for being cold at 10-15 degrees C, but the thing is, our houses in Norway, Finland, etc, are almost self-sustaining in terms of heat. You don't even need heating for many of them, your body heat circulates and isolates, the house is like a thermos.
In Spain, however, houses are designed to allow freshness for unbearable summer heat, so during winter, they withhold NO warmth at all, resulting in occupants constantly cold, I was really surprised - and uncomfortable!