1. Basilica Cistern (Yerebatan Sarnıcı)
The Basilica Cistern is the largest underground water reservoir in Istanbul, built in the 6th century under Emperor Justinian I. It was used to store water for the Grand Palace and city residents. Inside, there are 336 columns, many of which were taken fr om ancient temples. The most famous are the columns featuring the head of Medusa, which, according to legend, protect the cistern from evil spirits.
The structure covers 9,800 m² and can hold up to 80,000 cubic meters of water. The columns reach 9 meters in height, and the space between them is illuminated with soft lighting, creating a mystical atmosphere. This site attracts visitors with its unique architectural style and historical significance.
Location: Fatih district, Alemdar Street, 1
Metro: Sultanahmet
Unique atmosphere, historical significance, spectacular lighting.
2. Hagia Sophia Mosque (Ayasofya Camii)
Hagia Sophia, built in 537 by order of Emperor Justinian I, was the main church of the Byzantine Empire before becoming a mosque, then a museum, and now a mosque again. Its architecture combines elements of ancient, Byzantine, and Ottoman styles. The central dome is 55.6 meters high and has a diameter of 31 meters, making it one of the largest domes in the world. Inside, unique Byzantine mosaics have been preserved, though they were covered with plaster during the Ottoman period.
The building impresses with its scale and acoustics. The interior is richly decorated with marble, mosaics, and grand columns brought from ancient temples. Today, Hagia Sophia is not only a religious site but also a world-famous historical monument.
Location: Fatih district, Sultanahmet Square
Metro: Sultanahmet
Iconic landmark combining Byzantine and Ottoman architecture.
3. Blue Mosque (Sultanahmet Camii)
Built between 1609 and 1616 during the reign of Sultan Ahmed I, this is the only mosque in Turkey with six minarets, a feature that initially sparked controversy as only the Great Mosque of Mecca had the same number. The central dome is 43 meters high with a diameter of 23.5 meters.
The interior is adorned with over 20,000 Iznik ceramic tiles in shades of blue and turquoise, giving the mosque its popular name. The walls are decorated with Quranic verses, and the numerous stained-glass windows create an atmosphere of sacred light. Both tourists and worshippers visit to admire the architectural harmony and spiritual energy of this place.
Location: Fatih district, Sultanahmet Square
Metro: Sultanahmet
Symbol of Islamic architecture, stunning interior design.
4. Sultanahmet District (Sultanahmet Mahallesi)
The historical center of Istanbul, home to the city's main attractions. Here, you will find mosques, palaces, museums, and parks that create the atmosphere of the Ottoman era. The streets of Sultanahmet are paved with cobblestones, and the alleys are lined with historic buildings preserved from the Ottoman period.
This district is considered the cultural and tourist hub of the city, wh ere visitors can see monuments from both the Byzantine and Ottoman Empires. Many guided tours of the city start from here.
Location: Fatih district
Metro: Sultanahmet
Heart of historical Istanbul, home to many iconic landmarks.
5. Süleymaniye Mosque (Süleymaniye Camii)
Built between 1550 and 1557 by the architect Sinan under the order of Sultan Suleiman the Magnificent, this is one of the most magnificent Ottoman structures, showcasing exceptional engineering and refined style. The dome is 53 meters high with a diameter of 26.5 meters.
The mosque complex includes a madrasa (religious school), a library, baths, a hospital, and a caravanserai. The mosque's interior is minimalist yet captivating in its elegance and harmony. Around the mosque is a panoramic terrace offering breathtaking views of the Golden Horn.
Location: Fatih district, Süleymaniye Mahallesi
Metro: Vezneciler
Masterpiece of Ottoman architecture, stunning view of the Golden Horn.
6. Historic Districts of Istanbul
Istanbul's historic districts, such as Balat, Fener, Karaköy, and Eminönü, are living witnesses to past centuries. Balat is famous for its colorful houses and old Jewish quarter, Fener is home to the Ecumenical Patriarchate, Karaköy is a trade hub with European-style architecture, and Eminönü is a bustling spice market and maritime port.
These neighborhoods preserve a unique urban landscape reflecting Byzantine, Ottoman, and European influences. The narrow, cobbled streets, ancient mosques, Greek and Armenian churches create an atmosphere of cultural diversity. Walking through these districts is like stepping back in time.
Location: Balat, Fener, Karaköy, Eminönü
Metro: Eminönü, Karaköy
Rich historical significance, unique architecture, vibrant streets.
7. Istiklal Avenue (İstiklal Caddesi)
Istiklal Avenue is Istanbul’s main pedestrian street, stretching 1.4 km from Taksim Square to the Galata Tower. It is lined with luxury shops, restaurants, cafes, theaters, and old buildings in European style. The famous red nostalgic tram runs along the street, adding to its charm.
Istiklal is the center of cultural and nightlife in Istanbul, featuring art galleries, music clubs, historic passages, and bookstores. The street is always bustling, regardless of the time of day, making it one of the liveliest spots in the city.
Location: Beyoğlu district
Metro: Taksim
Heart of city life, festive atmosphere, iconic red tram.
8. Dolmabahçe Palace (Dolmabahçe Sarayı)
Dolmabahçe Palace, built between 1843 and 1856 by Sultan Abdülmecid I, symbolizes the grandeur of the Ottoman Empire. Its architecture blends Baroque, Rococo, Neoclassicism, and traditional Ottoman styles. The palace spans 45,000 m², housing 285 rooms, 44 halls, and 6 hammams.
Its main attraction is the crystal staircase adorned with Bohemian glass and the world's largest chandelier, weighing 4.5 tons, gifted by Queen Victoria. The last Ottoman sultan resided here, and later, Mustafa Kemal Atatürk spent his final years in the palace.
Location: Beşiktaş district
Metro: Kabataş
Lavish interior, historical significance, Bosphorus views.
9. Galata Tower (Galata Kulesi)
Built in 1348 by the Genoese as part of their defensive fortifications, the Galata Tower is one of Istanbul’s most iconic landmarks. It stands 67 meters tall, with a diameter of 16.5 meters and walls up to 3.75 meters thick.
Today, the Galata Tower offers one of the best panoramic views of Istanbul, overlooking the historical center, Bosphorus, and Golden Horn. Inside, there is a museum and a restaurant serving traditional Turkish cuisine. In the evenings, musical and dance performances are held here.
Location: Beyoğlu district
Metro: Şişhane
Spectacular panoramic view, historical significance.
10. Ortaköy
Ortaköy is one of Istanbul's most picturesque neighborhoods, located on the Bosphorus shore. Its main attraction is the Ortaköy Mosque (19th century), built in Neo-Baroque style, which looks stunning with the Bosphorus Bridge in the background.
The area is known for its cozy cafes, street food (especially stuffed baked potatoes, "kumpir"), and art markets. The relaxed atmosphere and waterfront views attract both tourists and locals.
Location: Beşiktaş district
Metro: Kabataş + bus to Ortaköy
Scenic views, architectural landmarks, local cuisine.
In 2024, Istanbul welcomed around 18.6 million international tourists, accounting for 35.3% of Turkey's total tourist flow. In 2023, Istanbul became the most visited city in the world, hosting 20.2 million tourists, surpassing megacities such as London and Dubai. Istanbul Airport welcomed 79,988,272 passengers in 2024, an increase of 5% compared to the previous year.