National Parks Connected by the John D. Rockefeller, Jr. Memorial Parkway, Yellowstone and Grand Teton national parks both offer dramatic scenery and unforgettable outdoor adventures — but make no mistake: They each deliver distinctly special experiences. GRAND PRISMATIC SPRING OLD FAITHFUL INN OLD FAITHFUL GEYSER @Matthew Paulson CLOCKWISE FROM TOP: WYOMING OFFICE OF TOURISM/PETER ADAMS; FLICKR/MARTIN DIEPEVEEN; FLICKR/MATTHEW PAULSON. OLD FAITHFUL & NEW FINDS 1 HOUR, 1 DAY OR 1 WEEKEND IN YELLOWSTONE A dynamic volcanic hotspot that also boasts more than 1,000 miles of hiking trails, nearly 300 waterfalls and the largest concentration of mammalian wildlife in the lower 48 states? That’s what we call a national treasure. Here’s how to cash in on Yellowstone’s riches, no matter how much time you have to spend. @Martin Diepeveen yellowstone in an hour If you’re aiming for the Yellowstone speed record, make a beeline for the park’s most famous feature: Old Faithful Geyser . With approximately 20 erup-tions every day, this reliable geyser’s frequency can be predicted with 90 percent accuracy, within about 10 minutes. Avoid the crowds with an early morning visit, then tuck in for a hearty breakfast at the Old Faithful Inn , a true icon of pioneer architecture. 51