Wondering this myself. I remember reading ( not too long ago ) that europeans lived longer and had better mental health because they napped more than americans. Wasn't it even encouraged to take naps at work for better mental function.
Is there a reference to siestas?
Not many people use their siesta to actually nap though anymore: maybe in august when it is 40+ Celcius it goes up but that is a few weeks a year and tourists basically pass out then too from too much booze and food around siesta time.
Sleeping in your car isn’t quite as popular in Europe.