We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.
We support the following browsers:
Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.
New! Find and book your ideal hotel on TripAdvisor — and get the lowest prices

Photo: “Provided by: Grotte di Frasassi”

From Review: Grotte di Frasassi of Grotte di Frasassi