The Devil’s Bath is New Zealand’s most surreal natural wonder, famous for its shocking, glowing green color. Located within the Wai-O-Tapu Thermal Wonderland near Rotorua, this geothermal pool looks like a bubbling cauldron of toxic waste or alien liquid. Despite its menacing appearance and name, it is a completely natural phenomenon created by extreme volcanic activity.
When the boiling water hits the air, hydrogen sulfide gas escapes, leaving behind a colloidal suspension of elemental sulfur. The arsenic rich water reflects light in a way that produces an unnatural, opalescent green. Early European settlers, seeing this steaming, foul-smelling cauldron surrounded by dead vegetation, believed it could only be a place where the Devil himself would bathe.
The yellow tint is actually caused by , but the specific hue is the result of a complex biological and chemical interaction:
Wai-O-Tapu Thermal Wonderland is located approximately 27 kilometers (about a 20-minute drive) south of Rotorua and about 53 kilometers north of Taupō, just off State Highway 5. Well-maintained highways make it easily accessible by rental car, and numerous guided tour buses operate daily out of Rotorua. Best Time to Visit the devils bath
The sinkhole measures roughly 359 meters (1,178 feet) in diameter and drops down to a depth of 44 meters (144 feet).
The pool is famous for its striking neon-green colour, which can shift from soft lime to a vivid "radioactive" yellow depending on the sunlight and cloud cover.
Huge amounts of sulfur rise to the surface and float in the water. The Devil’s Bath is New Zealand’s most surreal
The horror genre has long used historical settings to explore contemporary anxieties. The Devil’s Bath distinguishes itself by refusing allegory in favor of grim literalism. The film is based on actual parish records and court transcripts from Austria and Germany, documenting cases where women committed “indirect suicide” via murder (Kindesmord). To understand the film, one must first understand the theology: the Catholic Church of the 1700s taught that suicide was an unforgivable sin, damning the soul to eternal hell. However, if one committed a capital crime (such as infanticide), confessed, and received last rites before execution, one could die “penitent” and save one’s soul. The film’s horror, therefore, is theological mathematics—a perverse system that incentivizes murder as a route to salvation.
Folklore and local stories Stories vary by teller, but common threads appear: a lost traveler who vanished after a midnight dare, a bride who washed away her sorrow and never returned, and an old warning carved into a stone that reads simply, “Take nothing, leave everything.” Some elders insist the name comes from a time when the pool was thought to be the gateway to a realm of trickster spirits — a place that tests pride and punishes those who treat it lightly.
However, critics also warned potential viewers of its . The A.V. Club described it as “an achingly traumatic examination” that “will make you feel like utter garbage (on purpose).” Vulture’s review was titled simply: “I Never Want to See This Movie Again”—a statement of admiration, not contempt. The BFI wrote: “Movies don’t come any more unremittingly bleak than The Devil’s Bath .” When the boiling water hits the air, hydrogen
While the pool is mesmerizing to look at, it is incredibly hostile to life. The water is highly acidic, with a pH level similar to car battery acid. It is also completely stagnant, meaning it does not flow out into nearby rivers.
Visitors can view the Devil’s Bath via the walking tracks in the Waimangu Volcanic Valley. It is usually seen as part of the "Crater Walk," which descends from the valley rim to the shores of Lake Rotomahana.