Briefly about Svaneti..
Svaneti, the land of "Golden Fleece" and middle-aged towers, lies in the highlands of Western Georgia, 1600-244 m above sea level.
Mestia, surrounded by 5000m high peaks is a perfect starting point for most of the routses.
Ushguli, the highest permanently inhabited settlement in Europe, is a must see place in 3hours ride from Mestia.
The road from Zugdidi to Mestia is interesting by itself and filled with beautifull views, but it's quite exhausting - so it's better to plan at least 4-5 days for your trip to Svaneti.