Bosphorus Bridges, There are some bridges between Asia and Europe.
The Bosphorus Bridge (Turkish: Boğaziçi Köprüsü) or officially 15 July Martyrs Bridge (Turkish: 15 Temmuz Şehitler Köprüsü), also called the First Bridge (Turkish: Birinci Köprü), is one of the three suspension bridges spanning the Bosphorus strait (Turkish: Boğaziçi) in Istanbul, Turkey, thus connecting Europe and Asia (alongside Fatih Sultan Mehmet Bridge and Yavuz Sultan Selim Bridge). The bridge extends between Ortaköy (in Europe) and Beylerbeyi (in Asia).
The Fatih Sultan Mehmet Bridge ("Sultan Mehmed the Conqueror Bridge"), also known as the Second Bosphorus Bridge (in Turkish: Fatih Sultan Mehmet Köprüsü, F.S.M. Köprüsü or 2. Köprü), is a bridge in Istanbul, Turkey spanning the Bosphorus strait (Turkish: Boğaziçi). When completed in 1988, it was the 5th-longest suspension bridge span in the world; today it is the 24th.
The Yavuz Sultan Selim Bridge (Turkish: Yavuz Sultan Selim Köprüsü) is a bridge for rail and motor vehicle transit over the Bosphorus strait, to the north of two existing suspension bridges in Istanbul, Turkey. It was initially named the Third Bosphorus Bridge (with Bosphorus Bridge being the First Bosphorus Bridge and Fatih Sultan Mehmet Bridge the Second Bosphorus Bridge). It is about 5 km (3.1 mi) north of the Bosphorus Bridge. The bridge is located near the Black Sea entrance of the Bosphorus strait, between Garipçe in Sarıyer on the European side and Poyrazköy in Beykoz on the Asian side.
Marmaray ( listen)) is a partially operational rail transportation project in the Turkish city of Istanbul. It comprises a rail tunnel under the Bosphorus strait, and the modernization of existing suburban railway lines along the Sea of Marmara from Halkalı on the European side to Gebze on the Asian side. The procurement of new rolling stock for suburban passenger traffic is also part of the project. Construction started in 2004, with an initial target opening date of April 2009. After multiple delays caused by the discovery of historical and archaeological finds, the first phase of the project opened on October 29, 2013. It is the first standard gauge rail connection between Europe and Asia. The second phase of the project was scheduled to open in 2015, but the work has been stopped and it is unknown when it will be finished.
With The Following organization of Istanbul Daily Tours, you can visit the Bosphorus Boat Tour and others.