The Blue Caves are on the northern tip of Zakynthos, around Cape Skinari. Only accessible by boat, the caves are surrounded by natural arches in the rocks. The blue of the sea and sky reflect off of the white rocks, and the caves seem to glow as a result. Boats leave from several places on the island -- Porto Vromi, Ag. Nikolas and the Lighthouse at Skinari - and many of them combine trips to the Shipwreck as well. Diving trips to the Blue Caves are also available.