Nothing beats spending time by the water while you're on vacation. Take a picnic to Lake Küçükçekmece and then stay for a peaceful sunset.
Traveling on a shoestring? Lake Küçükçekmece is a terrific place to start your exploring in Istanbul. This body of water won't cost you a dime. Ataturk Olympic Stadium, Mall of Istanbul and Florya Beach are nearby and also worth seeing.