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Effigy Mounds National MonumentvsWashington Monument

Effigy Mounds National Monument has a higher Total Area (2,526 vs 105 acres), while Washington Monument has a higher Annual Visitors (2025) (204,489 vs 56,912 visitors), while Washington Monument has a higher Longitude (-77 vs -91 °).

Location & Classification

National Monument
Designation
National Memorial
IA
State(s)
DC
43
Latitude
39
-91
Longitude
-77

Size & Visitation

2,526
Total Area
105
56,912
Annual Visitors (2025)
204,489

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Data sourced from NPS Boundary & Tract Data Service (US Government (public domain)), NPS Visitor Use Statistics (2025) (CC0 (public domain)), NPS Acreage Report (Q1 2026) (US Government (public domain)).