Here are a few suggestions for your next trip from Han Krum
In 2 hours, you can reach Shumen.
In 3 hours, you can reach Veliko Tŭrnovo.
In 4 hours, you can reach Varna, Burgas, Pleven.
In 5 hours, you can reach Stara Zagora, Ruse, Sliven, Dobrich.
In 7 hours, you can reach Sofia, Plovdiv.
In 8 hours, you can reach Bucharest, Haskovo.