The solarium is a bright, sunny room with an indoor fountain. It was especially comfortable in the winter, as its many windows captured the sun's heat.
It was Bessie Johnson's favorite place to sit and read her Bible. She hosted a radio show about religious issues while living in Chicago. In Death Valley, Bessie continued sharing her beliefs by preaching sermons on Sundays, usually outdoors. She required everyone who worked at Scotty's Castle to attend. Bessie's sermons sometimes lasted over two hours.