Water treatment plant is not any more in service. It was abandoned 30 years ago. And now there is located museum. Building and all equipment is Well preserved. It is not like museum, but possibility to visit abandoned impressive part of historical industrial heritage. Entrance fee is 200czk or approx 8eur plus 50czk for boat ride in basement tunnel. Building is open and available only at tour times 4x times in day.

Ancient, technically and architectonically amazing, recommended for longer Prague visits. Kids are entertained about 20 minutes, then it is a little mono for them. 1 hour total. Worth of paying extra for boat.

The oldest sewage treatment plant in Prague, converted into the Eco-technical Museum.

Great tour. Eliška was a friendly + informative guide. Walk around in the old sewer system + see turn-of-the-century machinery. Pricey for a museum English tour but worth it. Take the boat ride for extra 50 Kč. Of course there is a pub on site.

Cool place to visit for an hour to learn about the process of water treatment. We were on the tour by ourselves and got a paper guide in English about all the stops. We were able to go anywhere we wanted and to take as many pictures as we liked. Great place if it's hot outside since it's mostly built underground so the temperatures are very cool.

Nice museum. Not ideal for a photoshoot, but very informative. It gives an overview about the sewage treatment, in an underground facility. Warning - it will most likely be in Czech language, if u can't understand you will be given printed notes. To be honest it is hard to keep up with the guides speed vs reading the notes. Im very happy that the guide spoke few words in every section for the two of us in the group. Could be a lot better with nice descriptions in both English and Czech in each section. The ride through the storage tank in dark was also nice but short, and you have the pay extra for it.

Interesting place to visit with a one-year-old and learn about how the city dealt with our human 'waste' in the past. Very industrial feel, Lynch-like vibe.

Great tour to do if interested in stuff other than tourist traps. My tour was spoken in Czech but the tour guide also gave me an English handout so I could read along. Overall I was very impressed with the tour and the facility and it was really cool to ride on a boat across one of the sedimentation tanks.

A nice place with the possibility of visiting the underground part of the old sewage treatment plant. Tours also in English.

For someone who likes early 20th century industrial sites this is a must see.

Very interesting place, as a museum and as an architecture masterpiece. Wonderful underground for steam punk lovers, for photographs and designers.

Ein tolles " Museum" aus den Anfängen der maschinellen Abwasserreinigung. Sehr interessant für jeden der mit industrieller und kommunaler Abwassertechnik zutun hat.

Amazing place, the guide did an excellent job in showing and explaining everything. Be ready to go through a dirty tunnel, so, better to wear some sneakers. The machines there are fascinating

Ideal place for wedding.

Czech spoken only, but you can get an English (...) paper with the explanation. Very nice building, architecture and machinery. Tip : Read all the text before the tour, you will understand better where you are and what is what. Tram 18 - bus 131 (very good restaurant nearby). Worth a visit. There is a good little bar - entrance on the side - in the building if you are early.

Perfect place if you’re interested into history and underground… especially during hot summer days 👍🏼

One of the most underrated tours in all of Prague, if you prefer industrial than art, this is the go to place, a fully functioning steam engine from the early 20th century