I used to randomly go to the train station and buy a ticket to the first destination on the departures board - spend a day in a place i had not been expecting to go. My theory is that when something is a surprise and random, you pay more attention to it as you want to savour every minute and explore as much as you can as you have come across it, not sure when you will get back again. This would all the more be intensified if able to fly to different cities and different countries. The amount of possiblities; the amount to explore; the amount to experience - all intensified through the surprise element. To spend time where no-one would know where you were, devoid of those responsiblities that tie us down and constrain us from our desires.