Day 2: Visits to Belogradchik fortress, Felix Romuliana (UNESCO sight) and Castra Martis.
Day 3: Morning visit to "Baba Vida" fortress (the only entirely preserved medieval castle in Bulgaria).
Day 4: Veliko Turnovo city tour including Tsarevets Fortress.
Day 5: Day tour to Cherven fortress and the Roman ruins of Nicopolis ad Istrum.
Day 6: Visits to Shumen and Ovech fortresses on the way to Varna.
Day 7: Day tour to Kaliakra fortress and the early Byzantine fortress in Yailata.
Day 8: Visit to Old Nessebar (included in the UNESCO list).
Day 9: Visits to the legendary Bukelon fortress and the 11th century Byzantine fortress near Mezek village.
Day 10: Visits to Perperikon and Tatul.
Day 11: Visits to to Ustra - X century Byzantine fortress and the Devil's bridge.
Day 12: Visit to Assenova fortress and the Renaissance town of Old Plovdiv.
Day 13: Day tour to Hisarya and the Thracian cult complex by the village of Starosel.
Day 14: Visit to Trayanovi Vrata fortress.
The price is 10 Euro per hour + petrol costs (air-conditioned car).
Also see tour packages in:
Europe Bulgaria History Whiz Archeology/History Sightseeing