Today, i visited Ihlamur Pavilions at Beşiktaş in Istanbul. It has really beautiful garden with ducks , rabbits and peacocks. If you need a break from city life i would strongly recommend Ihlamur Pavilions. You need to pay very small amount of money to visit the garden. It's 2.5TL, 0.71 US dollars and if you want to see inside the pavilions you also need to pay but it's less than 1 dollars.
Inside this beautiful garden there is a small cafeteria where you can have hot or cold drinks, breakfast and desserts by the small pool.
It has great architecture.
you can also see me in that picture :)
I am adding this video so you can kind a experience what i experienced there.
For more information you can visit:
http://www.millisaraylar.gov.tr/portalmain-en/Palaces.aspx?SarayId=17