Villa Gregoriana

A pope dug two tunnels through a mountain to stop a river flooding his town, and then landscaped the hole it left. After the Aniene burst its banks in 1826, Gregory XVI had the Cunicoli Gregoriani bored under Monte Catillo to carry the river away from Tivoli; what the diversion exposed was a gorge, and rather than fence it he had it made into a garden -- paths cut down into the Valle dell'Inferno, the Roman ruins at the top tidied into ruins, and Villa Gregoriana inaugurated in 1835. The result looks wild and is not. It is a Romantic garden built to the aesthetics of the sublime, and Goethe, Turner, Corot and Chateaubriand all came to it.

Visit if you:

• want a landscape that is entirely engineered and entirely convincing
• are interested in the Grand Tour, and in what nineteenth-century travellers actually came to look at
• like gorges, caves and the noise of water more than you like galleries
• care about Roman hydraulic engineering -- twelve ancient waterworks are known in this valley

Skip it if you:

• are travelling between 21 December and mid-February -- the park's published seasons stop on 20 December and do not resume until 14 February
• cannot manage a steep descent and climb on uneven paths: the route goes down into a gorge and out at the top of the other side
• are expecting the waterfall of the engravings -- four original falls are now two, and the river has been dammed for hydroelectricity since 1886

Everything that looks wild in Villa Gregoriana was composed, and most of it is nearly two centuries old. The paths, steps and cut passages like the Traforetto are 1830s engineering on a valley side that was described as geologically difficult even then; leaving the marked route puts weight on slope that the park has spent twenty years stabilising since the FAI took it on in 2002.

The Roman material is not fenced off in a separate zone. Twelve hydraulic works are known in this valley -- ditches, canals, sluices, aqueduct branches -- along with the remains of bridges and mills, many still in use or accessible, and the restored ruins of the villa of Manlius Vopiscus are part of the garden rather than an exhibit inside it.

The river is the park and it is already under pressure. Since 1886 the Aniene has been dammed at the tunnel mouths for hydroelectricity, and that plus the river's reduced natural flow has cut the water reaching the Great Waterfall. What goes into the gorge stays in it.

This is a FAI property held in concession and reopened in 2005 after the park had fallen derelict. Admission and FAI membership are what pay for keeping a two-kilometre route through a gorge safe and open.

Villa Gregoriana has been held in concession by the Fondo Ambiente Italiano from the Agenzia del Demanio since 2002, and reopened to the public in 2005 after a major landscape recovery. The address is Largo Sant'Angelo 1, Tivoli; the number is 0774 332650.

The park closes for roughly eight weeks each winter. Its published seasons are 14 February to 20 March, 9.30-17.00; 21 March to 28 June, 9.30-18.30; 29 June to 30 August, 9.00-19.00; 31 August to 11 October, 9.30-18.30; 12 to 24 October, 9.30-18.00; 25 October to 1 November, 9.30-17.00; 2 to 29 November, 9.30-16.30; and 30 November to 20 December, 9.30-16.00. Last entry is always an hour before closing. Every Friday and Saturday from 3 July to 5 September it also opens 21.00 to midnight for the Sere FAI d'Estate. Extraordinary openings and closures around holidays are published on the operator's own page.

Entry is from Largo Sant'Angelo; the exit and the bookshop are at the Temple of Vesta, so the route is one way. Guided visits for groups and school parties are available on booking. No admission price is quoted here because the operator publishes it through a booking system rather than on the page; check before travelling. (Hours as published by the operator on 8 October 2026.)

Check the dates before anything else: Villa Gregoriana's published seasons run from 14 February to 20 December, with nothing between. A trip in late December or January is not possible. Within the open season the hours move eight times -- 9.30-17.00 from mid-February, 9.30-18.30 from 21 March, 9.00-19.00 from 29 June, back to 9.30-18.30 on 31 August, then progressively shorter through October and November to 9.30-16.00 from 30 November -- with last entry always an hour before closing. Late spring and early autumn are the best of it: the gorge is wooded, the descent is steep, and July and August are hard work in heat even under the canopy. There is one genuinely unusual option: every Friday and Saturday from 3 July to 5 September the park opens again from 21.00 to midnight for the Sere FAI d'Estate. For the waterfall itself, water volume follows the river rather than the calendar, and has been permanently reduced since the 1886 hydroelectric works.