No clue how much it would be today, it was sooooo long time ago 🙂. As far as I can remember, people that took the more expensive option (going to another beach) said that the extra cost was not worth it.
Page 225 IN August, 1957, road improvements near Sperlonga, on the coast, about sixty-six miles southeast of Rome, offered G. Iacopi of the Terme Museum the opportunity for partially restoring, and closely examining, the ruins of a well-known villa there, commonly called the Villa of Tiberius.