Fodor's Expert Review Grotta dello Smeraldo

The tacky road sign, squadron of tour buses, Dean Martino–style boatmen, and free-form serenading (Andrea is the king of the grotto crooners) scream tourist trap, but there is, nevertheless, a compelling, eerie bellezza in the rock formations and luminous waters here. The karstic cave was originally part of the shore, but the lowest end sank into the sea. Intense greenish light filters into the water from an arch below sea level and is reflected off the cavern walls. You visit the Grotta dello Smeraldo, which is filled with huge stalactites and stalagmites, on a large rowboat. Don't let the boatman's constant spiel detract from the experience—just tune out and enjoy the sparkles, shapes, and brilliant colors. The light at the grotto is best from noon to 3 pm. You can take an elevator from the coast road down to the grotto, or in the summer you can drive to Amalfi and arrive by boat (€10, excluding the grotto's €6 admission fee). Companies in Positano, Amalfi, and elsewhere along the coast provide passage to the grotto, but consider one of the longer boat trips that explore Punta Campanella, Li Galli, and the more secluded spots along the coast.