Constanta is a city in Romania situated on the seaside of the Black Sea. In the summer it is a vibrant city with thousands of tourists flooding its streets and mostly its beaches in Mamaia (a section of the city filled with hotels, pubs, bars, beautiful huge beaches and clubs).
As you can see in the images below, Costanta is also amazingly beautiful in the winter time also. You can see Constanta in Google Maps here.
View full size photos here