There isn't a place in the United States specifically called a "Necropolis" in the traditional sense of a large, formal cemetery or city of the dead. The term "necropolis" is generally used to describe ancient burial grounds, like the Egyptian Necropolis of Saqqara.

However, the United States does have some cemeteries that could be considered grand or impressive enough to be called a "necropolis" in a more figurative sense. Some examples include:

* The National Cemetery System: These cemeteries, managed by the Department of Veterans Affairs, are spread across the country and are considered sacred grounds for honoring veterans.

* The Greenwood Cemetery in Brooklyn, New York: This cemetery, known for its beautiful landscape and impressive mausoleums, is considered one of the most famous and grand cemeteries in the US.

* The Oakwood Cemetery in Syracuse, New York: This cemetery features a wide array of monuments, including the famous "Angel of the Resurrection," which is considered one of the most iconic cemetery statues in the US.

Ultimately, whether a cemetery can be considered a "necropolis" is a matter of interpretation and depends on the scale, grandeur, and historical significance of the cemetery.