Thats actually interesting, I'm young and decided to go for my first "work from anywhere" and it's been almost two years now and I'm living currently in forest, my internet is slow and not stable... previously was living on small island in a wooden garage next to the beach with unstable GSM connection and no AC and right before it in a fantastic apartament in big city centre with stuning view and best internet connection I ever had.
Based on my experience it doesn't really matter from where but how frequent you change the location as it demands re-organisation from scratch every time.
Big factor in productivity is how satisfied you are from your life in general. When you feel cool and happy then even spending less time will bring more "wise" results than just being "ok" in a own fantastic apartament while hiting a wall for entire day trying to attack a problem.
To add one more thing, I was most productive living in this garage, working maybe 4h per day while rest of my time spending on bicycle, hiking, diving or talking with locals.
At this time my team mates were miserable and while declaring as they working the 8h, effects were not satisfying.
This is because even when I was doing other non-technical activities my brain was de-stressing but slowely building solutions for problems which I was executing later on in code and generally speaking I was livng a dream life as a "traveler".
