Go alone, where a pretty dress, and you'll get a heck lot more than your 5€ worth.
I paid my money, took the elevator down and as I was arriving into the cave, a boat full of your normal Brits, Germans and Jap tourists was loading up. I went over, then this hansom tour guide told me 'viene' ('come'). And took me out privately on the boat, quite blatantly too- might I add. I spent the next five minutes begging him to let me swim, and after some time he gave in. When the next boat full was loading up- he took me to the Emerald part and I took my clothes off, put my bikini on and jumped in. Now that was something spectacular- special. No money can buy that- so wear a pretty dress!
Some general info: Yes it costs 5€, you arrive (quite easily with a SITA bus, it's just 4km before Amalfi) and take an elevator down, unfortunately there is no stairs to stroll, walk about 10 meters and you're inside the cave, you get on a boat and the rowing-tour dude will show you around. Take notice of the beautiful texture and patterns of the natural cave, and trust me- it's beautiful, the sensation of the colour! Wow! I think the other tourists had swell time, singing at stuff, joking with the guy.
Moral of the story, like anything in life- it's what you make of it. Look closer, dig deeper, ask more questions but above all appreciate the beauty of this earth! (PS, this opinion is not one of some hippy, but a young kiwi gal living near Sorrento)
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