El Cid Castle was a landmark structure located on the opposite side of the western boundary of Sunnyslope, Arizona.

During World War II, Hall enlisted in the U.S. Army, graduated from the University of Arkansas Medical School, and was honorably discharged after a brief deployment to Italy in 1945.

[1][2][3][4][5] Dr. Hall felt that the growing population of Sunnyslope needed recreational facilities and therefore in 1963, he illegally diverted $16,564 in Medicare funds to help in the construction of a bowling alley which resembled a Moorish Castle.

[1][2][3][4][5] The venture was to include thirty-two bowling alley lanes, an ice skating rink, four recreation rooms for teenagers and a snack bar.

Dr. Hall had been performing unsanctioned medical operations, and his physician's license was revoked in 1971 after four patients died during gastric bypass surgery.

It is located at the Northwest corner of 19th Ave and West Cholla Drive which technically is on the opposite side Sunnyslope's western boundary.