Day 1 - Varna city tour including the imposing Cathedral, the Archaeological museum - showing the oldest Golden treasure in the world (over 6000 years), the mysterious "Panagia" church, the Roman baths, etc.
Day 2 - Day tour to Cape Kaliakra and The Romanian Queen Castle in Balchik (the summer residence of the Romanian Queen Maria)
Day 3 - Day tour to Madara Horseman (one of the most popular Bulgarian monuments included in the World Register of Historical Sites since 1979) and "The Stone Forest" (incredible natural phenomena over 40 000 000 years old)
Day 4 - Day tour to Nessebar (town museum included in World UNESCO heritage).
My price is 10 Euro per hour + petrol costs (air-conditioned car).
Also see tour packages in:
Europe Bulgaria Local Culture Sightseeing Cultural Journey