The St. Regis Istanbul is a luxurious hotel located in the Nisantasi district, known for its upscale shopping and dining. The hotel offers elegantly designed rooms, each featuring a bathtub for guests to relax and unwind. The St. Regis Istanbul also boasts a range of amenities, including a spa, fitness center, and multiple dining options. With its prime location and luxurious accommodations, this hotel is the perfect choice for travelers looking for a hotel with a bathtub in Istanbul.