This document compares and summarizes information about four national parks: Yellowstone National Park in the US, Banff National Park in Canada, Arenal Volcano National Park in Costa Rica, and Torres del Paine National Park in Chile. For each park, details are provided on location, establishment, attractions, visitation numbers, and communications strategies. Yellowstone is highlighted for its thermal features, designation as the first US national park, and targeting of families and older adventurers. Recommendations are made to advertise Yellowstone through commercials and a Google Maps partnership.