The Villa itself is interesting, but oh, the gardens, the fountains and the views are superb! www.villadestetivoli.info/storiae.htm
Tivoli itself is a nice hill town. too.
Tivoli is a short train journey from Rome. You can catch a bus into the centre, or walk; the Villa is signposted.
The villa of the powerful Borghese family. Not only the gardens are wonderful, the villa itself boasts some of the most famous works of the Baroque era. Some of the best Bernini sculptures are there. Booking required.
Entrance: Piazzale Museo Borghese; www.ticketeria.it/ticketeria/borghese-eng.asp
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