Sperlonga most important cultural attraction is the Villa of Tiberius. The ruins of the villa were hidden for centuries; it was rediscovered in 1957 during the construction of Via Flacca. The villa was called La Grotta (the cavern) because its banqueting hall was located in a natural grotto. A museum was built where once stood the villa; the gorgeous statues found in the cave are now housed here.
Interesting is also the oldest church of Sperlonga: the former Church of Saint Mary built during the 12th century. Today the deconsecrated building is used to host cultural events and performances. While the edifice was restored years ago some beautiful medieval mosaics were discovered.