old fortress in the mountains

asenova krepost asenovgrad balkan balkans bestofbulgaria bg bulgaria bulgarian bulgarianbeauty bulgariatourism castle defensive structure europe fortification fortress instabulgaria landscape mountain mountains mybulgaria sofia travel edeg nemicro efrac12 efrac34 esup2 esup3 nedeg eacute eplusmn eraquo eordm necedil neraquo nn emicro nefrac34 eiquest nnn