In the period of the Eocene era, the area of what is part of modern-day Egypt was an ancient sea, but for the next millions of years, sea shells such as nummulites were collected above the seabed. They were then formed into limestone, which would later be used to build the ancient Egyptian monuments.
The idea of traveling outside one’s city to go to the beach of another city during the summer became mainly widespread after the 23 July revolution of 1952
Ameer Group 
