This is a day trip you can take: https://www.tripadvisor.com/AttractionProductDetail-g294452-d11455042-Rila_Monastery_and_Boyana_Church_Day_Trip_from_Sofia-Sofia_Sofia_Region.html
Bulgaria is a producer of fine quality wines, some of which are made from unique kinds of grapes. It ranks in the top five wine producers of Europe and is attractive destination for wine tourism. Many companies offer various types of wine tours to any of the five wine regions in Bulgaria.
The Bulgarian Black Sea coast offers many diverse opportunities for recreation, entertainment, water sports, and sightseeing. It is well known for its long sandy beaches and beautiful landscapes along the coast, as well as upscale resorts and vacation complexes in the north and small family hotels, charming little resort towns, and camping facilities in the south. Flights from Sofia to the city of Varna on the northern coast or to the city of Burgas on the southern cost are about 45 minutes. You can also go by bus or train or rental car. The highways from Sofia to the coast are in great condition and driving is straight and easy. Nessebar is a town in Burgas Province, on Bulgaria’s Black Sea coast. The cobbled streets of the old town, which sits on a promontory, are lined with ruins such as Byzantine-era fortifications and baths. The ruins of the 5th-century Church of St. Sofia include stone columns and large arched windows.
Sozopol is an ancient seaside town located 35 km south of Burgas on the southern Bulgarian Black Sea Coast
Koprivshtitsa is a historic town in the Koprivshtitsa Municipality in Sofia Province, central Bulgaria, lying on the Topolnitsa River among the Sredna Gora mountain