Opi is a very small vilage near to Pescasseroli in the National Park of Abruzzo, Lazio and Molise. It is the nearest place to the Val Fondillo, not only one of the really great parts of the park but with an easy trail to walk. Opi itself is delightful, with splendid views from the top, but not provide much by way of specific sights.

It is a good base for seeing the National Park.