Killiney Hill is the southernmost of the two hills which form the southern boundary of Dublin Bay, the other being Dalkey Hill. These two hills form part of Killiney Hill Park. Crowned by a monument, Killiney Hill is 153 metres high and has views over the surrounding areas: Dublin to the northwest; the Irish Sea and the mountains of Wales to the east and southeast; and Bray Head and the Wicklow Mountains to the south.