A balcony is a porch or platform that extends from an upper floor of a building. Your apartment might have a balcony with a view of a city park.
Most balconies have railings around them to protect people from tumbling off, and many balconies provide an interesting view. You might linger on the balcony of your hotel room in Hawaii, enjoying the warm air and the distant glimpse of the ocean it gives you. Balcony comes from the Italian balcone, which in turn comes from balcone, or "scaffold." The root is most likely Germanic, possibly related to the Old English balca, "beam or ridge."