From the World Heritage inscription:
The capital of the Old Kingdom of Egypt has some extraordinary funerary monuments, including rock tombs, ornate mastabas, temples and pyramids. In ancient times, the site was considered one of the Seven Wonders of the World.
There isn’t much I can say about the pyramids because everyone has seen at least one National Geographic special on them and probably did a presentation on them in 4th grade. Visiting the pyramids was one of the most frustrating experiences I’ve ever had from a tourist perspective.