There are many rivers in Bulgaria. here are some: Danube, Iskar, Struma, Maritsa, Ossam etc.
Daniube, Iskar, Maritsa
Most of the Northern border of Bulgaria is defined by the Danube. A few other big rivers run trough the country, although none of them floatable - Maritsa, Struma, Iskar, to name a few.
Maritza, Iskar, Ropotamo, Tundja, Struma and Dunav (Danube)
Vast forest, minerals and coals in the mines, many rivers, ranges of mountains, sources of hydroelectricity, reservoirs of fresh water
There are many, many places in Bulgaria that are beautiful.
Romania's eastern border is the Black Sea (234 km), Prut + Danube rivers (aprox. 600 km). Bulgaria's eastern border is the Black Sea (354 km)/
There are many monastries in Bulgaria. Open the link pls.
Bulgaria is one country . ... Surely you mean how many counties or districts are there ?
In Bulgaria you can climb the mountains, play in the snow in the winter,Sun bathe on the beach in the summer,enjoy the wonderful culture and food, swim in one of the refreshing rivers or just enjoy your time with the locals
many
Bulgaria has the normal two seasons: Summer and Winter.