I visited this great WHS in March 2014. I visited Rome several times but this time round I decided to drive to Tivoli for a day trip. Villa d’Este and Villa Adriana are quite close to each other by car and it is feasible to visit both in 1 day. Hadrian’s villa is huge and 2-3 hours to be able to scrape the surface and understand its importance. The highlight of my visit was the Canopus with the replica statue of Mars. There are several thermal baths, columns, mosaics, etc to keep you busy exploring. It's definitely one of Italy’s top WHS.