20 units · Park Unit
Park Units
The Park Service lists 20 units without a formal designation in its API, and this page groups them under the generic label it uses. Lincoln Memorial draws more people than any of them, 7.7 million in 2025. None of them charges an entrance fee.
Where they are
Free to enter Charges an entrance feePoints are the Park Service reference point for each unit, not a boundary.
Ranked by 2025 visits
States with this designation
All states →Visit counts are from the NPS Visitor Use Statistics system. Designations, fees, alerts and campgrounds are from the NPS API. Data refreshed October 14, 2026. Other unit types.