None.
You may be thinking of the Suez Canal that ships use to travel from Africa to Asia.
The Suez Canal
The Suez Canal allows wider European commerce with Asia. The Suez Canal connects the Mediterranean to the Red Sea, and therefore to the Indian Ocean. It is valuable as a shortcut to Middle East oil supplies, although many of the largest modern tankers are too big for the Canal.
The Suez Canal connects the Red Sea and the Mediterranean Sea. Ships use the Suez Canal as a shortcut between Asia and Europe and the Americas. Thanks to the Suez Canal, they do not have to use the time or fuel to sail all the way around Africa just to get to Europe.
The Suez Canal, which connects the Mediterranean to the Red Sea. This canal cut the travel from Europe to Asia immensely because now travelers would only have to go through the Suez Canal (basically through Africa and the Arabian Peninsula) instead of going all the way around Africa.
The Suez Canal connects the Red Sea and the Mediterranean Sea. Ships use the Suez Canal as a shortcut between Asia and Europe and the Americas. Thanks to the Suez Canal, they do not have to use the time or fuel to sail all the way around Africa just to get to Europe.
Suez Canal
The Atlantic Ocean is a formal factor that connects Egypt to Africa to Europe and to the southwest Asia.
There are two countries which span both Europe and Asia: Russia and Turkey.
The UK has control over the canal that provides passage between Europe and Asia. This canal is called the Suez Canal and the UK has had control since 1936.
The Suez Canal allows cargo ships to get from Asia to Europe without having to go round the tip of Africa. This saves a lot of time and money.
Mediterranean Sea
Europe and Asia