I went to Monsanto with my husband the weekend between 10th and 12th July 2015, in a village called Monsanto, here in Portugal. The day we arrived (July 10th), at night, about 10pm, we went out for a walk and the sky was without clouds and the temperature was awesome for a summer night. During that walk (about 10.40pm) I saw a round green light ufo between two blinks, in the sky. No track left behind and by my eyesight it looked like it was at least 1 mile high. It looked like a round green traffic light, crossing the sky from West to East, Spain direction. I don't have much more information because it was between 2 eye blinks. I know it wasn't a plane because of the speed it was going. It wasn't any spotlight from a disco or a bar, because that village and surroundings doesn't have that kind of places... After, we stayed in a house with view and terrace and I went there and watched the sky for about 40mn hoping to see the same light again but never saw it. The night after (July 11th) I spent about 3h searching the sky, and unfortunately nothing.