If you find yourself in Turkey during عيد الأضحى, the chances are that you will not see the sacrifice of animals unless you head off to the rural areas. The only way it will affect you, is that travel on public transport will be hectic and most businesses will be closed. In the tourist areas, bars and restaurants will probably stay open.
عید قربان in Turkey is known as the Sacrifice holiday and is a major event in the Islamic calendar. The significance relates to the occasion in the Quran when Abraham was ready to sacrifice his son at the command of God. God interrupted the act and Abraham used a sheep instead however the celebration occurs to show the dedication of Abraham and his acknowledgment that God is everything.