The Bosporus or Bosphorus Strait is a natural strait and an internationally significant waterway located in Istanbul, Turkey. The Bosporus connects the Black Sea to the Sea of Marmara and forms one of the continental boundaries between Asia and Europe. It also divides Turkey by separating Asia minor from Thrace. It is the world's narrowest strait used for international navigation.
Anadoluhisarı, known historically as Güzelce Hisar is a medieval Ottoman fortress located in Istanbul, Turkey on the Anatolian (Asian) side of the Bosporus. The complex is the oldest surviving Turkish architectural structure built in Istanbul, and further gives its name to the neighborhood around it in the city's Beykoz district.
The Golden Horn is a major urban waterway and the primary inlet of the Bosphorus in Istanbul, Turkey. As a natural estuary that connects with the Bosphorus Strait at the point where the strait meets the Sea of Marmara, the waters of the Golden Horn help define the northern boundary of the peninsula constituting "Old Istanbul", the tip of which is the promontory of Sarayburnu, or Seraglio Point. This estuarial inlet geographically separates the historic center of Istanbul from the rest of the city, and forms a horn shape, sheltered harbor that in the course of history has protected Greek, Roman, Byzantine, Ottoman and other maritime trade ships for thousands of years.
Rumelihisarı or Boğazkesen Fortress is a medieval Ottoman fortress located in Istanbul, Turkey, on a series of hills on the European banks of the Bosphorus. The fortress also lends its name to the immediate neighborhood around it in the city's Sarıyer district.
Beşiktaş is a district and municipality of Istanbul Province, Turkey. Its area is 18 km2 and its population is 175,190 (2022). It is located on the European shore of the Bosphorus strait. It is bordered on the north by Sarıyer and Şişli, on the west by Kağıthane and Şişli, on the south by Beyoğlu, and on the east by the Bosphorus. Directly across the Bosphorus is the district of Üsküdar.
The Fatih Sultan Mehmet Bridge, also known as the Second Bosphorus Bridge, is a bridge in Istanbul, Turkey spanning the Bosphorus strait. When completed in 1988, it was the 5th-longest suspension bridge span in the world.
Ortaköy is a neighbourhood in the municipality and district of Beşiktaş, Istanbul Province, Turkey. Its population is 9,423 (2022). It is on the European shore of the Bosphorus. it was originally a small fishing village, known in Greek as Agios Fokas in the Byzantine period and then as Mesachorion.
Beykoz, also known as Beicos and Beikos, is a municipality and district of Istanbul Province, Turkey. Its area is 310 km2, and its population is 247,875 (2022). It lies at the northern end of the Bosphorus on the Anatolian side. The name is believed to be a combination of the words bey and kos, which means "village" in Farsi. Beykoz includes an area from the streams of Küçüksu and Göksu to the opening of the Bosphorus into the Black Sea, and the villages in the hinterland as far as the Riva creek. The municipality's mayor is Alaattin Köseler (CHP).
The Osmangazi Bridge is a suspension bridge spanning the Gulf of İzmit at its narrowest point, 2,620 m (8,600 ft). The bridge links the Turkish city of Gebze to the Yalova Province and carries the O-5 motorway across the gulf.
The Bosphorus Bridge, known officially as the 15 July Martyrs Bridge and colloquially as the First Bridge, is the oldest and southernmost of the three suspension bridges spanning the Bosphorus strait in Istanbul, Turkey, thus connecting Europe and Asia. The bridge extends between Ortaköy and Beylerbeyi.
The Turkish Straits are two internationally significant waterways in northwestern Turkey. The Straits create a series of international passages that connect the Aegean and Mediterranean seas to the Black Sea. They consist of the Dardanelles and the Bosphorus. The straits are on opposite ends of the Sea of Marmara. The straits and the Sea of Marmara are part of the sovereign sea territory of Turkey and are treated as Turkish internal waters.
Yoros Castle is a ruined castle dating back to Byzantine times that stands above the confluence of the Bosphorus and the Black Sea, to the north of Joshua's Hill, in Beykoz district, Istanbul, Turkey. It is commonly referred to as the Genoese Castle, due to Genoa’s possession of it in the mid-15th century.
The Yavuz Sultan Selim Bridge, also known as the Third Bosphorus Bridge, is a vehicular bridge over the Bosphorus strait, to the north of Istanbuls's two older suspension bridges, the 15 July Martyrs Bridge being the First Bosphorus Bridge and Fatih Sultan Mehmet Bridge the Second Bosphorus Bridge. The bridge is located near the entrance to the Black Sea from the Bosphorus strait, between Garipçe in Sarıyer on the European side and Poyrazköy in Beykoz on the Asian side.
The Eurasia Tunnel is a road tunnel in Istanbul, Turkey, crossing underneath the Bosphorus Strait. The tunnel was officially opened on 20 December 2016 and opened to traffic on 22 December 2016.
The 1915 Çanakkale Bridge is a road suspension bridge in the province of Çanakkale in northwestern Turkey. Situated just south of the coastal towns of Lapseki and Gelibolu, the bridge spans the Dardanelles, about 10 km (6.2 mi) south of the Sea of Marmara. The bridge was officially opened by President Recep Tayyip Erdoğan on 18 March 2022 after roughly five years of construction. The year "1915" in the official Turkish name honours an important Ottoman victory against firstly a naval engagement followed by a land invasion on the Gallipoli peninsular by the forces of Australia, New Zealand, France and The United Kingdom from the 25th April 1915 which were largely evacuated by December of that year.
Garipçe is a neighbourhood in the municipality and district of Sarıyer, Istanbul Province, Turkey. Its population is 391 (2022).
The Ayvalık Strait Bridge, also known as 15 Eylül Bridge, is a bridge crossing the Dolap Strait in Ayvalık, Balıkesir Province, western Turkey. It connects Cunda Island with Lale Island and, by extension, the town of Ayvalık on the mainland. It has been dubbed The first strait bridge in Turkey since it predates the Bosphorus Bridge in Istanbul (1970), which has a famous nickname as Strait Bridge.
A cable-stayed suspension bridge or CSS bridge merges the designs of cable-stayed bridges and suspension bridges. The suspension bridge's architecture is better at handling the load in the middle of the bridge, while the cable stayed bridge is better suited to handle the load closest to the tower. Combining these two architectural engineering ideas into a hybrid has been done in Istanbul with the Yavuz Sultan Selim Bridge. A bridge over the Krishna River in India has been approved in October 2022 that will be a CSS bridge design.