Beșiktaș Shipyard

Boğaziçi Shipyard (Turkish: Boğaziçi Tersanesi) is a Turkish shipyard established in Kadikoy, Istanbul, in 1992. The company's head office located in Istanbul, Turkey, new shipbuilding facilities located in Yalova Turkey.

Subaşı is a town (belde) in the Altınova District, Yalova Province, Turkey. Its population is 8,281 (2022). It is close to Hersek Headland of Marmara Sea and has almost merged to Altınova to the east. The distance to Yalova is 12 kilometres (7.5 mi). The name of the village refers to subaşi, a title in the Ottoman bureaucracy and the residents of the town are mostly Turkish, Tatar and Gagauz migrants who left Dobrudzha and Deliorman area in Romania today Bulgaria around 1935. The settlement was declared a seat of township in 1992. It suffered severely in the 7.6 magnitude 1999 İzmit earthquake.

Limnae or Limnai (Ancient Greek: Λίμναι) was a town of ancient Bithynia on the coast of the Propontis. It was a colony of Miletus.Its site is located near Hersek, in Asiatic Turkey.

Helenopolis (Greek: Ἑλενόπολις) or Drepana (Δρέπανα) or Drepanon (Δρέπανον) was an ancient Greco-Roman and Byzantine town in Bithynia, Asia Minor, on the southern side of the Gulf of Astacus. It has been identified with the modern village of Hersek, in the district of Altınova, Yalova Province. It is traditionally considered as the birthplace of Saint Helena.

Sefine Shipyard (Turkish: Sefine Tersanesi) is located in Yalova Province, Turkey. It builds a wide variety of ships including tugboats, fireboats, passenger/car ferries and well boats.

Altınova is a town in Yalova Province in the east of Marmara region of Turkey. It is the seat of Altınova District. Its population is 9,042 (2022). The mayor is Metin Oral (AK Party).

Hersek headland (Turkish: Hersek burnu) is a headland in Turkey.

Tavşanlı is a town (belde) in the Altınova District, Yalova Province, Turkey. Its population is 4,118 (2022). It is situated in the northern portion of Armutlu Peninsula. The distance to Altınova is 5 kilometres (3.1 mi) and to Yalova is 14 kilometres (8.7 mi). The ferry dock is only 3.5 kilometres (2.2 mi) to Tavşanlı and the picnik places around the town can easily by reached in daily tours from Istanbul. Fruit and vegetable farming as well as floriculture are the main sources of revenue of the town.

Altınova District is a district of the Yalova Province of Turkey. Its seat is the town of Altınova. Its area is 113 km2, and its population is 32,207 (2022).

The Osmangazi Bridge (Turkish: Osmangazi Köprüsü) 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 bridge was opened on 1 July 2016 to become the then-longest suspension bridge in Turkey and the fourth-longest (seventh-longest as of 2023) suspension bridge in the world by the length of its central span. The length of the bridge was surpassed by the Çanakkale 1915 Bridge across the Dardanelles strait, which became the longest suspension bridge in the world when it was opened on 18 March 2022.