On the southern face of the Freshkills landfill’s North mound, four large ponds of salt water capture and store heat radiating from both the sun and the landfill. Each pond is coupled with a tall solar chimney that extracts the heat and converts it to electricity. Multiple smaller salt ponds utilize the same heat to create an artificial hot springs for New York: The Solar Baths at Freshkills Park. The entire system is driven by the concept of the heat-cascade: the multi-stage reuse of residual thermal energy by temperature level. It aims to make that concept tangible to New Yorkers by inviting them to bathe in the heat of their own trash.