Bosphorus Strait history: Private day trip from Istanbul

The oldest surviving Ottoman structure in Istanbul, Anadoluhisari, was built in 1393 at the narrowest point of the Bosphorus — the first move in the Ottoman plan to cut Constantinople off from the Black Sea.

What to see

• Main tower and outer walls built by Sultan Bayezid I; reinforced by Mehmed II in the 1450s
• Direct sightline across the strait to Rumelihisari— the two castles chained the Bosphorus shut during the 1453 siege
• Goksu creek mouth below the walls — the natural harbor, the fortress was built to control
• Historic wooden yalı houses framing the fortress on every side

What to do

• Walk the exterior and down to the Goksu harbor
• Cross to the waterfront for the head-on view of Rumelihisari opposite

What to eat

• Fresh fish at the waterfront restaurants facing the European shore

A neoclassical pavilion gifted to Sultan Abdulmecid I by the Egyptian governor Mehmed Ali Pasha in 1845, the Mecidiye Kasri became the most diplomatically active imperial retreat on the Asian shore.

What to see

• Neoclassical facade with symmetrical design, large windows, and a grand double-staircase — one of the first Ottoman imperial buildings in a fully European style
• Restored reception rooms with original chandeliers and period furnishings
• Gardens descending to the Bosphorus with views north up the strait

What to do

• Use the audio guide — the clearest way through the pavilion's diplomatic history
• Walk to the Bosphorus-facing terrace for views towards the upper strait

What to know

• Prince Jerome Napoleon stayed here during the Crimean War; Sultan Abdulaziz hosted Empress Eugenie of France at a banquet here in 1869

Take note

• Closed Mondays; book tickets at https://millisaraylar.gov.tr/Lokasyon/8/Beykoz-Mecidiye-Kasri

Perched above the fishing village of Anadolu Kavagi at the northern mouth of the Bosphorus, the ruins of Yoros Castle is where the strait ends, the Black Sea begins, and two empires' worth of fortification still stands in wind-scoured ruins.

What to see

• The Byzantine and Genoese walls and towers of Yoros Castle, built in the 13th century to control passage between the Black Sea and the Bosphorus, the castle could cast a chain across the strait to block enemy ships
• Panoramic views from the castle ramparts over the Black Sea to the north, the Bosphorus to the south, and the forested hills of both the Asian and European shores
• The village of Anadolu Kavagi below, a working fishing village with a small harbor and a cluster of seafood restaurants

What to do

• Hike the 20-minute path from Anadolu Kavagi up to the castle, sturdy shoes recommended; the views on the way up are as good as those from the top

What to eat

• Grilled fresh fish at local bistros in Anadolu Kavagi before or after the castle walk