During the rainy summer of 1816 , the " Year Without a Summer " , the world was locked in a long cold volcanic winter caused by the eruption of Mount Tambora in 1815 . Mary Shelley , aged 18 , and her lover ( and later husband ) Percy Bysshe Shelley visited Lord Byron at the Villa Diodati by Lake Geneva in Switzerland . The weather was consistently too cold and dreary that summer to enjoy the outdoor holiday activities they had planned , so the group retired indoors until dawn
Year Without a Summer
Year Without a Summer
Frankenstein