Villa Gregoriana is a park located in Tivoli, Italy. It was created in the early 19th century by Pope Gregory XVI and designed by the French architect Jean-Baptiste Lepère. The park is situated in a gorge carved by the Aniene river, and features several waterfalls, grottoes, and pools.

The villa was built on the ruins of an ancient Roman villa that belonged to the emperor Hadrian. The park was designed to channel the Aniene river away from the nearby town of Tivoli, which had suffered from flooding and landslides. The construction of the park involved the creation of tunnels, dams, and aqueducts to divert the river and control its flow.

Today, the park is a popular tourist attraction and is known for its scenic beauty and historical significance. Visitors can explore the park's trails and walkways, which wind through lush vegetation and offer views of the waterfalls and grottoes. The park also contains several historic structures, including the ruins of the ancient Roman villa, a medieval tower, and a 16th-century church. In 2002, the park was designated a UNESCO World Heritage site as part of the "Villa Adriana and Villa d'Este" complex.