Bursa is a city close by the Istanbul. 2 hours from istanbul by ferry to bursa. There are lots of mountain Hotels and city hotels for accommodating the visitors. You can easly climb up to Uludag mountain and have a fantastic time and picnic on the mountain.
Depends the seson but you have a chance to make ski, motoski, and enjoy the snow. Accomodation in Uludag has great mountain view and athmospher for Nature lovers. Natural beauty is on top and feel cooler yourself even middle of the summer. Also you have a chance to visit first capital of ottoman Empire and their buildings as green mosque, old bazaar etc.
BURSA ULUDAG LISTED HOTELS