very nice mountainous road... when you turning back to the north from the south... you should choose this scenic road...
this is one of the most spectacular routes if you live in istanbul / Turkey.
this route goes to national park of uludağ mountain.
i had been to europe's legendary routes such as transalpina, transfagarasan, amalfi coast and alp mountains stelvio..
and this uludağ mountain is worth driving.
on the mid-way, uludağ sarıalan, you can have barbeque on the top of the mountain and have a drink. and going to keles from the mountain way is amazing.