2. Great Pyramids
Pyramids are the greatest ancient structures ever can seen on Earth. Even though many civilization built pyramids, the Egyptian pyramids stands as unique one. Great pyramid of giza always remains in the list of great wonders of ancient world. It is estimated that Egyptians started to built pyramids in 2700 BC, mainly as tomb for preserving royal bodies called mummies.
Great pyramid of Giza is the oldest and tallest pyramid of Egypt having height of 481 feet. It took almost 20 years to complete construction of a pyramid, using millions of lime stones. The inside of pyramids filled with valuable treasures with preserved bodies. The walls of pyramids also features beautiful paintings and carvings.