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Rumelihisarı (also known as Rumelian Fortress and Roumeli Hissar Fortress) or Boğazkesen Fortress (literally 'strait-cutter 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. Conceived and built between 1451 and 1452 CE on the orders of Sultan Mehmed II, the complex was commissioned in preparation for a planned Ottoman siege on the then-Byzantine city of Constantinople, with the goal of cutting off maritime military and logistical relief that could potentially come to the Byzantines' aid by way of the Bosphorus Strait, hence the fortress's alternative name, "Boğazkesen", i.e. "Strait-cutter" Castle. Its older sister structure, Anadoluhisari ("Anatolian Fortress"), sits on the opposite banks of the Bosporus, and the two fortresses worked in tandem during the final siege to throttle all naval traffic along the Bosphorus, thus helping the Ottomans achieve their goal of making the city of Constantinople (later renamed Istanbul) their new imperial capital in 1453. After the Ottoman conquest of the city, Rumelihisarı served as a customs checkpoint and occasional prison, notably for the embassies of states that were at war with the Empire. After suffering extensive damage in the Great Earthquake of 1509, the structure was repaired, and was used continuously until the late 19th century. Today, the fortress is a popular museum open to the public, and further acts as an open-air venue for seasonal concerts, art festivals, and special events.

Rumelihisarı is a neighbourhood in the municipality and district of Sarıyer, Istanbul Province, Turkey. Its population is 10,073 (2022). It is on the European side of Istanbul. The neighborhood is famous for and named after its medieval fortress, Rumelihisarı, built by Mehmed the Conqueror between 1451 and 1452 CE. Looking at its administrative borders, to the north is Baltalimanı, to the northwest is Fatih Sultan Mehmet, to the west is Etiler, a district of Beşiktaş distrcit, to the south is Bebek of Beşiktaş again, and to the east is the Bosphorus Strait.

Pyrrhias Cyon was a town of ancient Thrace, inhabited during Roman times.Its site is located near Rumeli Hisar in European Turkey.

Aşiyan Museum (Turkish: Aşiyan Müzesi) is the house of famous Turkish poet Tevfik Fikret (1867–1915) at Aşiyan neighborhood of Beşiktaş district in Istanbul. It was built in 1906 and later in 1945 converted to a museum. The museum is owned by the Istanbul Metropolitan Municipality.

The Aşiyan Asri Cemetery (Turkish: Aşiyan Asri Mezarlığı) is a burial ground situated on Aşiyan between the Bebek and Rumelihisarı neighborhoods of the European part of Istanbul, Turkey. Many renowned intellectuals, writers and artists rest in this small cemetery, which has a panoramic view of the Bosporus.

Boğaziçi University (Turkish: Boğaziçi Üniversitesi) is a major research university in Istanbul, Turkey. Its main campus is located on the European side of the Bosphorus strait. It has six faculties and two schools offering undergraduate degrees, and six institutes offering graduate degrees. Traditionally, the language of instruction is English. Despite the fact of there being no official statement, the university is also, and alternatively, referred to as the "Bosphorus University".Founded in 1863, as Robert College, it is the first American higher education institution founded outside the United States. Though under entirely Turkish administration today, the university still maintains strong ties to the American educational system. Boğaziçi University consistently ranks highest in Turkey, having the greatest number of applicants via Turkish university entrance examinations which makes it the most selective state university in Turkey. The well-known programs are electrical and electronics engineering, computer engineering, and industrial engineering. Only the top 800 of the approximately 1.8 million participants in the annual Turkish university entrance examination (TYT-AYT) are admitted to register for these subjects at the university. To be admitted into other degree programs, one usually has to be in the top 1% of the university entrance exam as well. This allows Boğaziçi University to attract many of the highest scoring students; as well as having the most preferred applied science, education, engineering, and social science programs in Turkey.

Baltalimanı is a neighborhood at a bay of the European coast of Bosporus, in the Sarıyer district of Istanbul, Turkey. The name means "axe port" in Turkish. The place is known for the Treaty of Balta Liman, signed between Great Britain and the Ottoman Empire in 1838.

The Fatih Sultan Mehmet Bridge ("Sultan Mehmed the Conqueror Bridge"; Turkish: Fatih Sultan Mehmet Köprüsü, abbreviated as F.S.M. Köprüsü), also known as the Second Bosphorus Bridge (İkinci 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. The bridge is named after the 15th-century Ottoman Sultan Mehmed the Conqueror, who conquered the Byzantine capital, Constantinople (Istanbul), in 1453. It carries the European route E80, Asian Highway 1, Asian Highway 5 and Otoyol 2 highways. There are three other bridges that connect Europe and Asia located in Turkey which are named Yavuz Sultan Selim Bridge, 15 July Martyrs Bridge (formerly known as Bosphorus Bridge) and 1915 Çanakkale Bridge.

Aşiyan is a planned underground station and the eastern terminus of the under construction F4 funicular line of the Istanbul Metro in Beşiktaş, Istanbul. The station will be located next to the Aşiyan Park, along Cevdet Paşa Avenue on the Bosphorus strait in Bebek. The station is expected to open, along with the F4 line, in April-2022.

Boğaziçi Üniversitesi, formerly named Hisarüstü, is an underground rapid transit station on the M6 line of the Istanbul Metro. It is located in northeast Beşiktaş under Hisar Üstü Nispetiye Avenue. The station is named after the Boğaziçi University which is located right next to it. A funicular railway is planned between Hisarüstü and Aşiyan, on the Bosphorus.

The Sabancı University Sakıp Sabancı Museum (Turkish: Sakıp Sabancı Müzesi) is a private fine arts museum in Istanbul, Turkey, dedicated to calligraphic art, religious and state documents, as well as paintings of the Ottoman era. The museum was founded by Sakıp Sabancı, and was opened in June 2002. Aside from permanent exhibitions, the museum also hosts national and foreign temporary exhibitions and, hosts cultural events on the weekends. Recently the museum gained worldwide attention when it exhibited the works of Pablo Picasso and Auguste Rodin.

Phidalia Petra was a town of ancient Thrace, inhabited during Roman and Byzantine times.Its site is located at Baltalimanı in European Turkey.