Scotty's Castle is a two-story Spanish Villa located in northern Death Valley National Park, California, USA. It is also known as Death Valley Ranch. Scotty's Castle is not a real castle, and it did not belong to the "Scotty" from whom it got its name.

Construction began on Scotty's Castle in 1922, and cost between $1.5 and $2.5 million. A man named Walter Scott born in Cynthiana, Kentucky, also known as “Death Valley Scotty”, convinced Chicago millionaire Albert Johnson to invest in his gold mine in the Death Valley area. By 1937, Johnson had acquired more than 1,500 acres in Grapevine Canyon, where the ranch is located.

After Johnson and his wife made several trips to the region, and his health improved, construction began. It was Mrs. Johnson's idea to build something comfortable for their vacations in the area, and the villa eventually became a winter home.

The stock market crash of 1929, however, made it difficult for Johnson to finish construction. The Johnsons died without heirs and they left the property to the Gospel Foundation. In 1970, the National Park Service purchased the villa for $850,000 from the foundation. Walter Scott died in 1954 and was buried on the hill overlooking Scotty's Castle.

The Park Service gives guided tours of Scotty's Castle today. During the tour, guests are treated to the sounds of a 1,121 pipe Welte theater organ. An underground mystery tour is also available for those wishing to see the inner-workings of the building. One-quarter of a mile of tunnels run under the building, where visitors can visit the powerhouse and see thousands of tiles that were to be used for the never-finished swimming pool.