Category: Natural Environment
Density Grid of 239 Waterfalls in Oregon
Percent of Contiguous US County Area Covered by Water
2018 US Volcano Footprint and Threat Level
Most Threatening US Volcanoes and Population by Proximity
46% of Canada’s Population is Within 100 km from a National Park
US National Park Footprint
Mt. St. Helens: Before and After Elevation
