Yum Burnu
Encyclopedia
Yum Burnu the ancient Ancyræan Cape or Ancyræan Promontory and the modern Greek Cape Psomion, is the cape at the northeast end of the Bosphorus, where it enters the Black Sea
Black Sea
The Black Sea is bounded by Europe, Anatolia and the Caucasus and is ultimately connected to the Atlantic Ocean via the Mediterranean and the Aegean seas and various straits. The Bosphorus strait connects it to the Sea of Marmara, and the strait of the Dardanelles connects that sea to the Aegean...

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It is a bold headland
Headland
A headland is a point of land, usually high and often with a sheer drop, that extends out into a body of water.Headland can also refer to:*Headlands and bays*headLand, an Australian television series...

 descending almost perpendicularly into the water.

Just below it is a reef
Reef
In nautical terminology, a reef is a rock, sandbar, or other feature lying beneath the surface of the water ....

 which is often identified as the Asian side of the mythical Symplegades
Symplegades
The Symplegades or Clashing Rocks, also known as the Cyanean Rocks, were, according to Greek mythology, a pair of rocks at the Bosphorus that clashed together randomly. They were defeated by Jason and the Argonauts, who would have been lost and killed by the rocks except for Phineas' advice. Jason...

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