Most water purification plants are devoid of personality, but that’s not so for the Swiss city of Muttenz’s new water treatment facility. Designed by international architectural firm Oppenheim Architecture, the Muttenz Water Purification Plant rejects the sterile stereotype and adopts a curving and organic form that looks as if the building was naturally sculpted out of the earth. Set within a lush green forest next to the river Rhine, the low-maintenance industrial plant not only sensitively and sustainably adapts to its natural surroundings, but also serves as a new city landmark that includes a public-facing area to educate the population about the facility’s three-phased, state-of-the-art water purification process.