The film "In the Mouth of Madness" was filmed in Toronto, Canada.

Filming Locations:

Psychiatric Hospital

In the Movie

In Reality

The scene was filmed at Built in 1941 on the site of a former amusement park, the R. C. Harris plant currently supplies nearly half of Toronto's drinking water. The building was designed in the Art Deco style and is popularly known as the Palace of Purification for its grand architecture both inside and out. The plant was named after Rowland Caldwell Harris, who was Toronto's Commissioner of Works at the time of construction.

Cafe

In the Movie

In Reality

Publisher's Office

In the Movie

In Reality

Railroad Crossing

In the Movie

In Reality

Main Street of Hobbs End

In the Movie

In Reality

The scene was filmed at The historic main street of Unionville is a popular tourist route, as it retains a small-town atmosphere amidst all the surrounding development, preserving many features dating back to the village's founding in 1794.

Pickman Hotel

In the Movie

In Reality

The scene was filmed at Built in 1936 for inventor Robert Jackson, this isolated estate in the Rouge Valley is now owned and maintained by the nearby Toronto Zoo and used for events and filming.

Black Church

In the Movie

In Reality

Woodbine Motel

In the Movie

In Reality

Records Office

In the Movie

In Reality