英文關鍵字
skyline
urban
city
sky
america
skyscraper
scene
us
american
building
river
business
trip
1960
1960s
history
archival
historic
usa
travel
outdoors
nature
tourism
tourist
vacations
journey
waterfall
architecture
downtown
chimney
smoke
industrial
port
factory
powerplant
observation
cloudy
industry
panoramic
panorama
aerial
tower