In the 21st century, we have specific clinical terms for depression: Anhedonia, MDD, Serotonin deficiency. Yet, the power of the phrase "The Devil’s Bath" lies in its visceral, tangible dread. A doctor’s diagnosis of "major depression" feels sterile. Telling someone you are "taking a bath with the devil" communicates the heat, the sulfur stench, and the drowning sensation of mental illness.

As we watch tourism videos of the glowing green pool in New Zealand, or sit in a dark theater watching Agnes drown in her own skin, we are reminded of three truths:

The film is meticulously researched and based on real court records and executioner’s logs from Austria and Germany. Franz and Fiala drew from the book The Devil’s Bath: A History of Female Melancholy and Murder (by historian Kathy Stuart), which documents dozens of cases where women killed infants (often their own, but sometimes others’) specifically to be executed. These women believed that by committing a capital crime, confessing, and receiving last rites, they could bypass Purgatory and Hell entirely—since execution was seen as an act of atonement. The title refers to the folk belief that the devil’s bath (a stagnant, soul-sapping swamp) is where such desperate thoughts fester.

True to its name, this geothermal pool looks like a basin of toxic lime-green liquid. The vibrant, otherworldly hue is not dye or pollution; it is a result of high concentrations of arsenic and sulfur. As groundwater seeps deep into the earth, it is superheated by volcanic magma. The water dissolves minerals like arsenic, antimony, and mercury from the surrounding rocks before rising back to the surface.

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.

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.

Safety Warning: Like all geothermal features in New Zealand, the Devil’s Bath is dangerous. The water is often boiling hot (close to surface boiling point), and the surrounding rocks can be unstable and slippery. Visitors are strictly advised to stay on the designated paths and boardwalks. The crater is essentially a calm-looking cauldron of heated acid, and falling in would be fatal.

While it looks beautiful, the Devil’s Bath is harsh environment. It is classified as an acid-sulphate spring. This means the water is heated by a deep magma source, but because the rocks below are permeable, the water mixes with rising volcanic gases like hydrogen sulphide.

When these gases interact with oxygen and water near the surface, they form sulphuric acid. Consequently, the water in the Devil’s Bath is highly acidic, with a pH level often well below 3 (similar to vinegar or stomach acid). This acidity prevents most common aquatic life from surviving there, contributing to its "dead" or "hellish" aesthetic.

For Letterboxd or Twitter (X):

"The Devil’s Bath: A film so bleak that a beheading feels like a happy ending. Austria’s answer to The Passion of Joan of Arc if Joan was simply very tired and had a bad mother-in-law. Essential, but bring a blanket. 🖤🐦‍⬛"

For Instagram (Caption):

Imagine the quiet dread of The Witch mixed with the historical misery of The Revenant. Now remove all hope. The Devil’s Bath is a masterpiece of folk horror that argues the scariest thing in the world isn't a demon—it's a lack of options. 🌿🔪 #TheDevilsBath #FolkHorror

What did it mean to live inside The Devil’s Bath? Historical medical texts describe a "weariness of life" (Lebensmüdigkeit) distinct from typical sadness. Symptoms included:

Dr. Veronika Fuechtner, a scholar of German studies, notes that "The Devil’s Bath was the peasant’s diagnosis for clinical depression in a world that did not have a biological vocabulary for mental illness."

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The Devils Bath

In the 21st century, we have specific clinical terms for depression: Anhedonia, MDD, Serotonin deficiency. Yet, the power of the phrase "The Devil’s Bath" lies in its visceral, tangible dread. A doctor’s diagnosis of "major depression" feels sterile. Telling someone you are "taking a bath with the devil" communicates the heat, the sulfur stench, and the drowning sensation of mental illness.

As we watch tourism videos of the glowing green pool in New Zealand, or sit in a dark theater watching Agnes drown in her own skin, we are reminded of three truths:

The film is meticulously researched and based on real court records and executioner’s logs from Austria and Germany. Franz and Fiala drew from the book The Devil’s Bath: A History of Female Melancholy and Murder (by historian Kathy Stuart), which documents dozens of cases where women killed infants (often their own, but sometimes others’) specifically to be executed. These women believed that by committing a capital crime, confessing, and receiving last rites, they could bypass Purgatory and Hell entirely—since execution was seen as an act of atonement. The title refers to the folk belief that the devil’s bath (a stagnant, soul-sapping swamp) is where such desperate thoughts fester.

True to its name, this geothermal pool looks like a basin of toxic lime-green liquid. The vibrant, otherworldly hue is not dye or pollution; it is a result of high concentrations of arsenic and sulfur. As groundwater seeps deep into the earth, it is superheated by volcanic magma. The water dissolves minerals like arsenic, antimony, and mercury from the surrounding rocks before rising back to the surface. the devils bath

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.

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.

Safety Warning: Like all geothermal features in New Zealand, the Devil’s Bath is dangerous. The water is often boiling hot (close to surface boiling point), and the surrounding rocks can be unstable and slippery. Visitors are strictly advised to stay on the designated paths and boardwalks. The crater is essentially a calm-looking cauldron of heated acid, and falling in would be fatal. In the 21st century, we have specific clinical

While it looks beautiful, the Devil’s Bath is harsh environment. It is classified as an acid-sulphate spring. This means the water is heated by a deep magma source, but because the rocks below are permeable, the water mixes with rising volcanic gases like hydrogen sulphide.

When these gases interact with oxygen and water near the surface, they form sulphuric acid. Consequently, the water in the Devil’s Bath is highly acidic, with a pH level often well below 3 (similar to vinegar or stomach acid). This acidity prevents most common aquatic life from surviving there, contributing to its "dead" or "hellish" aesthetic.

For Letterboxd or Twitter (X):

"The Devil’s Bath: A film so bleak that a beheading feels like a happy ending. Austria’s answer to The Passion of Joan of Arc if Joan was simply very tired and had a bad mother-in-law. Essential, but bring a blanket. 🖤🐦‍⬛"

For Instagram (Caption):

Imagine the quiet dread of The Witch mixed with the historical misery of The Revenant. Now remove all hope. The Devil’s Bath is a masterpiece of folk horror that argues the scariest thing in the world isn't a demon—it's a lack of options. 🌿🔪 #TheDevilsBath #FolkHorror True to its name, this geothermal pool looks

What did it mean to live inside The Devil’s Bath? Historical medical texts describe a "weariness of life" (Lebensmüdigkeit) distinct from typical sadness. Symptoms included:

Dr. Veronika Fuechtner, a scholar of German studies, notes that "The Devil’s Bath was the peasant’s diagnosis for clinical depression in a world that did not have a biological vocabulary for mental illness."