The Marmaray is a major transportation project in Istanbul, Turkey, designed to connect the European and Asian sides of the city. It features a railway tunnel under the Bosphorus Strait, allowing for efficient travel between the two continents. The project was completed in 2013 and is part of a larger effort to improve public transportation in the region. The Marmaray system includes modern trains and several stations, enhancing connectivity for commuters. It is integrated with other forms of public transport, such as buses and trams, making it easier for residents and visitors to navigate Istanbul.