Dubrovnik is a sight for sore eyes
It is a beautiful city, just big to do much exploring but not big enough to get lost. There is a small night life, and during the day much to see including day-trip to nearby islands!
Insider Tip:If you can, stay in old town, within Dubrovnik walls. The area by the large port is a good 20 minute walk away along a narrow road kinda dangerous, unless you take the shuttle bus back and forth.