Blue Goo

Turns out, it's all so they can put this blue goo on the balcony/walkway. I guess they are sealing the concrete. Maybe they'll do more - no way to tell.
That box is the outside part of the heat pump in Dante's room. That's how everything is heated here. Very efficient, since it never gets much below 0C. In Nikko, where it gets colder, our hotel had indoor kerosene heaters. The smell was yucky - I'd hate to live with that all the time.