Lets travel to Egypt

Egypt is one of the most popular place for tourists to travel. People would love to visit Cairo and the Giza City. This is because one of the seven wonders in the ancient world which is The Great Pyramid of Khufu located here. It is the oldest and largest among three pyramids in the Giza Necropolis. The Great Pyramid of Khufu is the only one that survives substantially intact until now. The other two pyramids are:

Great pyramid of Khafre

Great Pyramid of Menkaure

The Great Pyramid of Khufu also called The Pyramid of Giza or The Great Pyramid of Cheops. It is believed that this pyramid was built as a tomb for forth dynasty Egyptian Pharaoh Khufu (Cheops in Greek). This pyramid was constructed over 20 years period concluding around 2551 BC. The Great Pyramid was the tallest man-made structure in the world for over 3,800 years.

Originally the Great Pyramid was covered by casing stones that formed a smooth outer surface, and what is seen today is the underlying core structure. Some of the casing stones that once covered the structure can still be seen around the base. There have been varying scientific and alternative theories regarding the Great Pyramid's construction techniques. Most accepted construction hypotheses are based on the idea that it was built by moving huge stones from a quarry and dragging and lifting them into place.

How about its height?
Well, it is believed that at the time of construction, the original height of this pyramid was 146.478 metres (480.57 ft). Because of erosion and absense of its pyramidion, the current height of this pyramid is 138.75 metres (455.22 ft).

The pyramid has three burial chambers. The first is underground, carved into bedrock. The second, aboveground chamber was called the queen's chamber by early explorers. We now know it was never intended to house one of Khufu's wives but perhaps a sacred statue of the king himself. The third is the king's chamber, which held a red granite sarcophagus placed almost exactly at the center of the pyramid.

The king's chamber is accessed via the 26-foot-high (8-meter-high) Grand Gallery, which was sealed off from thieves by sliding granite blocking systems.

The Great Pyramid was the centerpiece of an elaborate complex, which included several small pyramids, five boat pits, a mortuary temple, a causeway, a valley temple, and many flat-roofed tombs for officials and some members of the royal family.

source: wikipedia,national goegraphic