The coastal areas of Killiney are often compared to the Bay of Naples in Italy. This comparison is reflected in the names of surrounding roads, like Vico, Sorrento, Monte Alverno, San Elmo and Capri. On clear days, the Mourne Mountains of County Down can be seen. Killiney Hill Park was once part of the estate of Killiney Castle, now a hotel. Since early 2010, a pod of bottlenose dolphins has been seen occasionally in Killiney Bay.