Wow I definitely recommend going on this tour if you're in Vienna! SF loves these obscure things to do and I love wastewater so it was the perfect activity to do! SF reserved the tickets online and we picked them up at the vendor. It was a small shack near the entrance to the sewer and we chose the English tour. The tour was less than an hour but it was so exciting! Coincidentally, it was raining right when we started our tour, so we actually saw the rainwater infiltration when we were at the grit chamber part of the tour. That was pretty cool. I loved how different sections of the sewer tour had lights to showcase.
Most people do this tour because there were some chase scenes from a movie, but SF and I went on it to learn more about Vienna and their wastewater process. Pretty enlightening and hands-on, definitely recommend! read more