英文關鍵字
alternative
america
architecture
bridge
building
canyon
concrete
construction
contemporary
dam
destination
electric
electricity
energy
engineer
engineering
evening
exterior
famous
high
historic
hoover
hydro
hydroelectric
industrial
lake
landmark
landscape
mead
mountain
national
nature
nevada
people
power
reservoir
river
road
station
sunny
supply
tourism
tower
travel
usa
view
water