aerial
agger
agger dam
alternative
architecture
artificial lake
bridge
concrete
construction
dam
dam wall
drone
electric
electricity
energy
europe
generator
germany
gummersbach
high
hydro
hydroelectric
hydroelectricity
hydropower
industrial
industry
lake
landscape
lantenbach
mountain
plant
power
power plant
reservoir
river
station
structure
technology
up
valley
view
wall
water
waterfall