aerial
aerial view
balkans
beautiful
bulgaria
canyon
cascade
dam
devin
engineering
environment
europe
forest
geological
gorge
hill
hydro
hydroelectricity
lake
landmark
landscape
leisure
majestic
meadow
meander
mountain
nature
panorama
peninsula
power
reservoir
resource
rhodope
river
rodopi
scenery
scenics
sight
sightseeing
smolyan region
terrain
tourism
travel
tree
tsankov kamak
tsankov kamak dam
tsankov kamak reservoir
vacha
view
water
wilderness