What is pyramids in us?

There are no pyramids in the United States. Pyramids were primarily built in ancient Egypt and other parts of the world for religious and burial purposes. The most famous pyramids are the Great Pyramids of Giza located in Egypt. There are some structures in the United States that have pyramid-like shapes, such as the Luxor Hotel and Casino in Las Vegas, which has a pyramid-shaped building, but these are not true pyramids in the historical and architectural sense.