Nitt Witt Ridge is a house on two and a half acres in the coastal city of Cambria, California, United States.

Artist and recluse Arthur "Art" Harold Beal (1896–1992) bought his hillside lot in 1928 and spent most of the next 50 years carving out the terraces with only a pick and shovel, creating his own "castle on a hill".

Beal was a garbage collector for the town of Cambria in the 1940s and 1950s and made good use of what Cambrians were throwing away, as well as the natural materials on the property, in the nearby pine forests, and on the area's beaches.

[1] The plaque reads: Nitt Witt Ridge, one of California's remarkable twentieth-century folk-art environments, is the creation of Arthur Harold Beal (Der Tinkerpaw, or Capt Nitt Witt), a Cambria Pines pioneer who sculpted the land using hand tools and indigenous materials, inventiveness and self-taught skills.

A blend of native materials and contemporary elements, impressive in its sheer mass and meticulous placement, it is a revealing memorial to Art's cosmic humor and zest for life.