Zurich also does free recycling center and water treatment facility tours. There is also a nuclear power plant tour, but of course they don't let you near the i

Zurich also does free recycling center and water treatment facility tours. There is also a nuclear power plant tour, but of course they don't let you near the interesting bits in that one. https://www.zuerich.com/en/visit/tours-excursions/from-sewage-to-clean-water https://www.zuerich.com/en/visit/tours-excursions/from-sewag...