Blue Grotto, Capri, Italy Watch a 2:39 minute video of the Blue Grotto. The Blue Grotto—a place that needs to be seen in color to fully appreciate the magnificence. (CC BY 2.0 ©2016 Brad Coy) The tiny, cramped entrance to the Blue Grotto. (CC BY 2.0 ©2016 Mathew Ingram)