Pyramids of Giza is one of the Seven Wonders of the Ancient World. It is believed to be built over a span of 20 years around 2500 BC by Egyptians. Nobody knows what’s inside Pyramids of Giza. Some say there are tombs, some say there are priceless treasures. The pyramids are made of Limestone and this is the oldest wonder which still remains largely intact. No words to explain the aesthetics of these tall pyramids.