If you are coming here for holidays and the wind is strong (which it was when I was there), you can try some amazing water sports for close to nothing. Bulgaria is probably the cheapest European destination, with Hotel rooms starting at 20 euros, dishes in restaurants at around 3-4 euros, and very affordable kite lessons.
Why so interesting? First of all, it might be the oldest city still inhabited in the world! The Bulgarians say that it has been inhabited non-stop for the last 6000 years! Well that’s impressive! It was called Philippopolis, the city of Phillip. The city was originally a Thracian settlement and subsequently was invaded by Persians, Greeks, Celts, Romans, Goths, Huns, Bulgars, Slavs, Russians, Crusaders, and Turks. Woah! That’s quite something! And the remains of those times are still present in the city.