It is a beautiful historical city with several castles/forts to visit, good restaurants and beaches (for the summer).
Nafplion is a very easy town to get around. The centre is very old and full of atmosphere with lots of little restaurants, bars and shops.
Castle and other places of interest can easily be seen in 2 days.
Naplion is a charming place on the sea, with a great weather and amazing food. Perfect for a relaxing vacation.