We all know about seven wonders of the earth; the Great Pyramid of Giza is one of them. There are many mysteries that need to solve like how those people brought each piece of these pyramids together and what kind of concrete they have used, how this structure is so perfectly aligned. As we know that that time, technology was absolutely absent.

1. Hidden chambers in the Great Pyramid of Giza

Scientists have discovered the hidden chamber in the pyramid that is known as  Khufu's Pyramid for its builder, a 4th Dynasty pharaoh who reigned from 2509 to 2483 B.C. These include the King’s chamber, which still holds a stone sarcophagus, the smaller Queen’s chamber, and a sloping passageway known as the Grand Gallery.

2. The ancient air conditioner

Despite the harsh fluctuating temperatures of day and night, the great pyramids maintain a constant inside temperature of 20 degrees Celsius. This is an ancient air conditioning mystery which yet to be discovered.

3. The curse of the pharao’s tomb

There is a famous curse of the pharaoh known as the "Curse of the Pharaoh’’ or ‘’King Tut's Curse’’. The story is those who dared to violate the boy king's final resting place faced a terrible curse. Archaeologists Howard Carter lifted the lid of the Pharoah's sarcophagus in 1923 killed by a mosquito bite.

4. Ton Swivel Door

Ton Swivel Door  In the Great Pyramid of Giza There exists a total of 3 swivel doors, One of the enormous doors is so well balanced that it can be opened from the inside with just one hand and after closing it blends perfectly as if nothing is there.

5. Bricks That Weighed More Than an Elephant

The stones used to build these pyramids weigh about 5-10 tons per piece which were heavier than the elephant. The time when there was no technology, no crane it's hard to believe how these pyramids were actually lifted, drag, and used to laid one by one on top of each other.

6. The huge statue of Sphinx

The huge statue of Sphinx was built near the great pyramid around 4500 years ago. Sphinx, is a limestone statue of a reclining sphinx, a mythical creature with the body of a lion and the head of a human.[1] Facing directly from West to East, it stands on the Giza Plateau on the west bank of the Nile in Giza. It is said that the purpose of the Sphinx was to guard the pyramid of Khafre at Giza.

7. Planetary alignment pyramid

It posits that there is a correlation between the location of the three largest pyramids of the Giza pyramid complex and Orion's Belt of the constellation Orion and that this correlation was intended as such by the original builders of the Giza pyramid complex.