Nancy Parode, about.com's guide to Senior Travel, sent me her Grotto of Tiberius Picture Gallery. The Grotto of Tiberius is near Sperlonga, off the Via Flacca, or SS-213, that runs along the coast of the Tyrrhenian Sea between Rome and Naples.

Nancy, who used to live near Naples, recommends taking the Via Flacca for off the beaten track travel in the Southern Lazio and Campania regions. Read more about sight-seeing on the Via Flacca including a visit to a winery and the beach town of Sperlonga.