The once-mighty people who built gigantic cities hid most of their secrets behind the veil of time.
We know of the Maya that they developed their writing system, created a sophisticated calendar, and had their formulas for mathematical calculations. They also had their engineering tools with which they built huge pyramidal temples and created irrigation systems for their farmland.
The Indus (Harrapa) Civilization
At the time of this civilization, the Indus Valley was home to nearly 10% of the world's population the time-5 million people.
The Indus civilization is also called the Harappa civilization (after the name of its center, the city of Harappa). These powerful people had a developed metallurgical industry. They had their writing, which, unfortunately, remains one of the mysteries of this civilization.
Rapanui civilization on Easter Island
This piece of land lost in the ocean surrounded itself with just a huge number of mysteries and legends. To this day, there is still a debate going on in scientific circles as to who first inhabited the island. According to one version, the first inhabitants of Rapa Nui (as the inhabitants call Easter Island) were East Polynesians who sailed here around A.D. 300 on huge and sturdy boats.
The oldest metropolis in the world. Sounds impressive, doesn't it? Çatal-Hüyük was built during the advanced Neolithic civilization (more than nine and a half thousand years ago) on the territory of what is now modern Turkey.
This temple is still a mysterious construction. The only thing that is known about it is that it was built around 10,000 BC. The unusual name of this complex, which is located on Turkish territory, translates as "a hollow hill. Only 5 percent of the structure has been investigated to date, so archaeologists have yet to find answers to numerous questions.