Ancient Egyptians originally buried their dead in the

Ancient Egyptians originally buried their dead in the  pyramids.

Explanation:

The pyramids of Egypt were the graves of the pharaohs of Egypt, who were considered gods. The royal mummy was placed in a tomb chamber under a pyramid or in an above-ground chamber. Pharaohs were mummified because the preservation of the earthly body was believed to be necessary for the transition beyond.

Therefore, the pyramids that remain in Egypt today are the remains of these structures that served as necropolis for the ancient kings of Egypt.