Plovdiv

Plovdiv (Bulgarian: Пловдив) is the second largest city in Bulgaria, with a population of 376,918. It is the administrative centre of Plovdiv Province in southern Bulgaria, as well as the largest and most important city of the historical region of Thrace, famous for its ancient and diverse culture and millenary history.
The city is located on both banks of the Maritsa in the central part of the Upper Thracian Lowlands. The country is mostly plain, but Plovdiv is particularly known, like Rome, for its seven hills, one of which was destroyed in the beginning of the 20th century.
A couple of key thoroughfares cross the city, including the one connecting Sofia with Istanbul through Edirne, as well as the one between Sofia and Burgas through Stara Zagora. Plovdiv is regarded as the gate to the Rhodopes, as most people who head for the mountains choose it as their starting point. The city has three railway stations (and an additional railway stop) and three bus stations. There are two types of buses that run in Plovdiv. There is the regular buses that run throughout the city at regular intervals for a fee of 60 Stotinki, and there are also trolley buses (bus powered by overhead electric cables) which are cheaper to use and run less frequently.
http://en.wikipedia.org/wiki/Plovdiv