Cheops Location: 

Giza - 9.3 miles from downtown Cairo . 
The only surviving wonder of the seven wonders of the ancient world ,The great pyramid of Giza built for king Khufu (Cheops)to be his last resting place during the 4th dynasty of the old kingdom,the height of the great pyramid is 479 feet which is equal to a 42 story building,it was the tallest structure on earth until Eiffel tower was built in 1889.Around 2,700,000 blocks of local limestone were used in the construction ,the volume of these blocks is enough to build 35 Empire state buildings and these blocks are considered to be the biggest blocks ever moved by human-beings on our planet (the smallest one weights 2.7 tones and the biggest one goes up to 20 tones). It was estimated that 100.000 Egyptian well-trained workers were involved in such a huge and highly-organized construction project for a 3 months shift on a rotating basis for 21 years.The great pyramid of king Cheops is an overwhelming result of very sophisticated astronomical calculations the four sides of the pyramid are perfectly corresponding the four cardinal points and the side that has the entrance is facing very precisely the true north.

 
Chefren:

Pyramid of king Khafre (Chephren)son and successor of Cheops is considered the second biggest pyramid in Giza plateau, it is 469 feet tall and slightly shorter than the pyramid of his father Cheops.the second pyramid is the only one in Giza area that shows how did the ancient Egyptians finished their pyramids because it is the only one that is still cased with the fine and smooth layer of limestone only seen on the very top part of it.the second pyramid of Chephren is still connected with the valley temple where the king was mummified by one mile causeway both in an excellent condition. 

Mykerinus:

Location: Giza - 9 miles from downtown Cairo . 
Who built it? It was built by Mykerinus who ascended the throne after the death of his father Cherfen . This king ruled for 21 years and others say it was extended to 28years. 

Why was it built?

This pyramid was built as the ancient Egyptians believe in resurrection. Mykerinus was buried in this pyramid according to the ancient Egyptian concept of life after death. 

Explanation:

This pyramid was excavated in 1839 BC. Its plan is smaller than the two others pyramids in Giza area, its height is 216 feet . This pyramid was cased with a layer of granite and not white limestone like his predecessors. It should be mention that The three pyramids of Giza are surrounded by small pyramids and Mastaba tombs that belong to the royal family, nobles and high ranking people..