Carbon Spring is a waste-to-energy-to-onsen system that utilizes the exhaust heat and gases to heat the carbonated onsen and engage the traveler in a spatially convoluted and psychologically contemplative walk. It uses the phenomenon of chemical transformation of CO2, which is not visible to the visitor, as a metaphor for the excessive human activity that causes warming. The circulation path is disruptive to the mental experience of the visitor. The visitor will need to sacrifice – to climb the tunnel of stairs that spirals around the tower, building up anticipation in total internal invisibility – to reach the bathhouse of hedonistic pleasure. Then, the visitor will leave the bathhouse descending a walled spiral, where they can hear the laughter from the bathhouse recede in distance and feel and see the heat of the gas pipes close around the path, until they exit the tower. On the path of exodus, the visitor is a voluntary prisoner; those who ascend the path of anticipation and finally enjoy a bath in the carbon spring are put in the place of elites, while a closer contact with exhaust pipes and an uncomfortable walk awaits them. We are setting up a gentle reminder that exile and ecstasy cannot be independent from warming and a circulatory sequence to contemplate on people’s impact on warming.