The “bubbles” are the symbol of Grenoble. They are the famous tourist cable cars, shaped as spheres, that, with a journey through the air, will bring you quickly to the top of the mount that watch over the town. In few minutes, you get right at the Bastille, so that you can keep your energy to continue the day trip to the other peaks.
The office I have been assigned when in Grenoble had a view on the mountains that surround the town. I am not used to it. I come from the biggest plain of Italy, where everything is flat, allowing you to scan the horizon very far from where you are. Mountains and hills can be seen, but they always seem so far.