Most natural arches in one region

Most natural arches in one region
Who
Arches National Park
Where
United States
When
prehistory BC

Arches National Park in eastern Utah, USA, has 2,067 documented natural arches with spans of three feet or more.

Tassili National Park in Algeria has around 800 documented arches of significant size. Tassili is larger in area than Arches National Park so it is possible that it contains more, but this park has yet to be scrutinised to the degree Arches National Park has been.