A shuttle service from istanbul or Sabiha  airport to hotel is available  and 60 eu extra fees till 4 person per way and times. 
Asian Shore & Maiden's Tower Tour

Highlights of This Tour:
Travel to another continent across the Bosphorus Bridge, a graceful span connecting Asia and Europe. Then admire the view from Camlica, a wooded hilltop, Beylerbeyi, an imperial waterfront palace on the shores of the Bosphorus, and the famed Maiden's Tower, located at the mouth of the Sea of Marmara.

Daily Afternoon Tour (except Mondays and Thursdays) - Itinerary:
A pleasant drive to the Asian part of Istanbul over the Intercontinental Bosphorus Bridge.

Camlica Hill:
The highest point in Istanbul, commanding a panoramic view of the city.

Beylerbeyi Palace:
We take a short drive to the 19th century summer palace of the Sultans in the Bosphorus village of Beylerbeyi. Completed in 1865, the palace has 24 rooms and six large halls.

Maiden's Tower:
The first structure is believed to have been built on this tiny islet by Athenian leader Alcibiades, in 411 BC. Much has changed since then, but the Maiden's Tower is still the best spot from which to admire Istanbul's sea, sky and silhouette.

ISTANBUL