If you visit the Grotto of Tiberius, you will be able to explore the villa complex and see ancient Roman construction methods up close.
View of Villa Walls, Grotto of Tiberius, Sperlonga, Italy
By Nancy Parode, About.com Guide
Tiberius' villa / grotto complex was quite elaborate, featuring indoor pools and even a fish hatchery.
Photo © Nancy Parode
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