Here are a few suggestions for your next trip from Biser(BG)

In 2 hours, you can reach Haskovo.

In 3 hours, you can reach Plovdiv, Stara Zagora.

In 5 hours, you can reach Burgas, Sliven.

In 6 hours, you can reach Sofia, Veliko Tŭrnovo.

In 7 hours, you can reach Varna, Shumen.

In 8 hours, you can reach Ruse, Pleven, Pernik, Dobrich.