aerial
aerial view
asenovgrad
balkans
bulgaria
cascade
chetiridesette izvora
dam
drone
engineering
environment
europe
forest
forty springs
geological
hill
hydro
hydroelectricity
landmark
landscape
leisure
meadow
meander
mountain
natural
nature
panorama
peninsula
plovdiv region
power
reservoir
rhodope
rhodopes
rodopi
scenery
scenics
sight
sightseeing
summer
the forty springs
the forty springs reservoir
thrace
tourism
travel
upper thracian plain
view
water
wilderness