Parco Villa Gregoriana, commissioned by Pope Gregory XVI in the early 19th century, is known for its wild and dramatic landscape. Set at the edge of a wooded gorge on a bend in the Aniene River, the park's rugged terrain makes for excellent hikes through the woods that run from one side of the ravine to the other. The ancient Roman necropolis at Tivoli sits right behind the park, while a Roman villa and the Temple of Vesta sit within.
The park is easily visited on a day trip from Rome. You can purchase your ticket in advance to skip the lines at the entrance, or join a Tivoli tour that includes a visit to the Villa Gregoriana Park, Villa d’Este, and Hadrian’s Villa (Villa Adriana) nearby.