A Cure for Wellness is a 2016 psychological horror film directed by Gore Verbinski and written by Justin Haythe. Haythe and Verbinski were inspired by Thomas Mann's 1924 novel The Magic Mountain while coming up with the idea for the film. Starring Dane DeHaan, Jason Isaacs, and Mia Goth, the plot follows a young executive who is sent to retrieve his company's CEO from a mysterious rehabilitation center in the Swiss Alps.

An international co-production based in the United States, Germany, and Luxembourg, the film was shot on location at various German locations, including Hohenzollern Castle in Baden-Württemberg.

A Cure for Wellness was released on February 17, 2017, by 20th Century Fox and received generally mixed reviews from critics, who praised its visuals, cinematography, performances and ambition, but criticized its length, script and narrative. It grossed $26 million against its $40 million production budget, making it a box-office bomb.

Lockhart, an executive at a financial services firm in New York City, is sent by the board of directors to retrieve CEO Roland Pembroke, who had abruptly decided to stay at a "wellness center" in the Swiss Alps. At the spa, Lockhart is met with resistance by the staff and Dr. Heinreich Volmer in attempting to speak with Pembroke.

Lockhart leaves, but is involved in a car crash and awakens at the center – supposedly three days later – with his leg in a plaster cast. In spite of the horrendous collision, both he and the driver suffered only minor injuries. Lockhart meets a mysterious young girl named Hannah who, among others, doses herself with a mysterious fluid from small, blue bottles.

Patient Victoria Watkins and residents of the nearby town regale a fascinated Lockhart with the history of the spa. It was built on the ruins of a castle owned 200 years ago by a baron, who desired an heir of pure blood and married his sister. Learning she was infertile, he performed hellish experiments on the peasants to find a cure. He succeeded, but after finding the carelessly buried bodies of his victims, the peasants stormed the castle and set it on fire. They captured the baron's pregnant sister and the baby was cut from her womb before she was burned. The baby was thrown into the local aquifer, but somehow survived.

Lockhart attempts to escape the center but finds no one is allowed to leave. After giving Hannah a ballerina figurine, Lockhart bikes into town with her help, leaving her in a bar and seeking out a translator for Pembroke's German medical dossier. He learns that the people of the spa suffer from dehydration despite the water they imbibe from the aquifer. Hannah, kept at the spa her entire life, explores the bar and attracts the locals' attention. Lockhart returns and gets into a fight with a man who was dancing with Hannah. He is rescued by Dr. Volmer, by whom the locals are curiously cowed.

Lockhart discovers the transfusion wing of the spa is a front for macabre medical experiments, and that the water from the local aquifer possesses unique properties – toxic to humans, but with life-restoring properties for the eels living in the water. The baron had devised a process to filter the water through the bodies of humans and distill it into a life-giving essence; Volmer uses the patients as filters for this process.