The 231-room DoubleTree by Hilton Istanbul-Avcilar debuted Friday, on the western side of the Turkish city in the new trade-and-business district. It is the brand's third property in Istanbul and its fifth in Turkey. The hotel offers views of the Marmara Sea and Kucukcekmece Lake, as well as complimentary Internet access in all guest rooms. An on-site restaurant serves local and international cuisine, and a fitness center, a Turkish bath, an indoor pool and a spa also are available. The hotel has eight meeting rooms accommodating 10 to 750 attendees, as well as a large ballroom.