Answer:
The reason it is still standing is because of all the mystery's inside and also because it is a historical landmark.
Step-by-step explanation:
Egyptologists believe that the pyramid was built as a tomb for the Fourth Dynasty Egyptian pharaoh Khufu over a 20-year period concluding around 2560 BC. Initially standing at 146.5 meters (481 feet), the Great Pyramid was the tallest man-made structure in the world for more than 3,800 years.