Diliskelesi railway station

Diliskelesi is a neighbourhood of the municipality and district of Dilovası, Kocaeli Province, Turkey. Its population is 10,910 (2022). It is a port on the north side of the Gulf of İzmit.

Dilovası is a municipality and district of Kocaeli Province, Turkey. Its area is 125 km2, and its population is 53,416 (2022). The district Dilovası was created in 2008 from part of the district of Gebze, along with the districts Darıca and Çayırova. The mayor is Hamza Şayir (AKP).

Libyssa (Ancient Greek: Λίβυσσα) or Libysa (Λίβισσα), was a town on the north coast of the Sinus Astacenus in ancient Bithynia, on the road from Nicaea to Chalcedon. It was celebrated in antiquity as the place containing the tomb of the Carthaginian general Hannibal. In Pliny's time the town no longer existed, but the spot was noticed only because of the tumulus of Hannibal. The site of ancient Libyssa is located within the modern district of Gebze in Kocaeli Province, at the coast of the Gulf of İzmit, near the city of İzmit (ancient Nicomedia) in northwestern Anatolia, Turkey. Hannibal's monumental tomb in Gebze, Kocaeli, Turkey. Atatürk, the founding father of the Republic of Turkey, revered and admired Hannibal so much he honored him with a symbolic tomb close to where Hannibal had died.

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.

Altıntel Port ( Altıntel Tank ve Terminal İşletmeleri A.Ş.) is a tank terminal and port located in Kocaeli/GEBZE, Dilovası OSB Organized Industrial Zone of Turkey. It was established in 1987 for the storage of liquid chemical materials. Its primary customer is Arkem Chemicals, who started renting storage tanks in 1990's and took over the company in 2008.

IT Valley (Turkish: Bilişim Vadisi), formerly known as Silicon Valley of Turkey (Turkish: Türkiye'nin Silikon Vadisi) was a proposed project of Turkish architect Günay Erdem and Turkish landscape architect Sunay Erdem for the Turkish version of the Silicon Valley at San Francisco, United States.

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

TEV İnanç Türkeş High School for Gifted Students (Turkish: TEV İnanç Türkeş Özel Lisesi) is an independent private co-educational boarding school for the gifted and talented in Turkey.

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.

Tavşancıl railway station was a railway station in Tavşancıl, Turkey on the Istanbul-Ankara railway. It was located in the southern part of the town on the shore of the Gulf of İzmit. The station was a stop on the Adapazarı Express regional train service; 11 daily eastbound trains and 13 daily westbound trains stopped at Tavşancıl. The opening date of the station is unclear, but the station was rebuilt and expanded in 1975, when the Turkish State Railways double-tracked the railway from Gebze to Arifiye. Tavşancıl station closed on 1 February 2012 and the platforms were demolished shortly after.

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.

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.