Joe P.
Yelp
We took a bus tour via Viator (a Trip Advisor co), from Rome to Tivoli. The tour included the 2,000 yr old Roman ruins of VA (Emperor Hadrian's Villa), and Villa d'Este, a 500 yr old Renaissance villa previously used by the Pope (next review).
The English speaking tour is everything you would expect. The group was small, the guide was local and spoke very good English, the bus had good A/C and the walking was leisurely, although there were some inclines. Nonetheless, if a 91 yr old woman in our group could handle the walk, no one had any complaints.
We saw the library, the bathhouses, the pool, the dining hall, the road from Rome, the slaves' quarters and more. Our guide showed us renditions of what the villa would have looked like during Roman times: The villa encompasses a lot of land and the structures were elaborate. The Emperor would have had a large entourage of nobles, guards and slaves. The grounds would have been large enuf to accommodate them all. Lastly, we also saw a 1,000 yr old olive tree that still produces olives. Tivoli specializes in olive oil from these ancient trees, and you can buy some from a vendor close to Villa d'Este.
All in all, a wonderful stop on a day trip from Rome that is only 30 mi away. However you get to Tivoli, I recommend VA bc it is a nice site to learn about Roman history.