Evidence that aircraft were flying over the region at far lower altitudes is clearly visible in this high-resolution image taken by the satellite’s MODIS instrument.

At first, it appears someone had been skywriting high above the Mediterranean.

But more careful examination reveals that the aircraft contrails were probably the result of a holding pattern or flight exercises by the Egyptian military.

One of the country’s main air bases is located on the outskirts of Mersa Matruh, seen in the lower right of the image.

The crisp and neat oval shapes left hanging in the sky could well be due to precision flying techniques being practiced by Egyptian pilots.

Mersa Matruh is also the site of Rommel's Cave, hideout of the Nazis' “Desert Fox.” It was used by the German general during his World War II Desert Campaign.

In ancient times, the Egyptian outpost was also called Amouni due to its location along a path to the temple of the god Amoun, "the hidden one."

There are references that the city was built by Alexander the Great, on his way to pay tribute to Amoun in order for him to become a Egyptian pharaoh. It was also the site of a palace for Cleopatra.

Today, Mersa Matruh is a popular retreat for Cairo residents, looking to escape the broiling summertime heat of the dusty Egyptian capital. It is said to have some of the most beautiful beaches in the world.

Image: NASA MODIS Rapid Response System