Heliopolis is a settlement in Egypt, city of ancient Egypt. Pyramason catalogues it as PYR-089935 at 30.12953, 31.28889 (30°07'46.3"N 31°17'20.0"E).
There are 2 other catalogued sites within 5 km of it, 106 within 25 km and 216 within 50 km. That density is itself the finding: this is not an isolated monument but part of a worked landscape.