Photographs by: Denali: troutnut, Getty Images; Everglades: ROBERT67, Getty Images; Great Smoky Mountains: iStock, Dean_Fikar; Hawai’i Volcanoes: Mint Images, Frans Lanting, Getty Images; Yellowstone geyser: Shutterstock, DJHolmes86; Grand Canyon: Dan Ballard, Getty Images; deciduous forest: Westend61, Getty Images; prairie: Shutterstock, jaroslava V; tundra: Kevin Smith, Design Pics, Getty Images; rain forest: photoDISC; wetlands: Elena Elisseeva, Dreamstime; desert: Shutterstock, apdesign; mule ride: HagePhoto, Getty Images; airboat: Robert Holland, Getty Images; bicycle: Hoxton, Tom Merton, Getty Images; snowmobile: Shutterstock, bikeriderlondon; Jeep: Steven Greaves, Getty Images; horse-drawn carriage: iStock, studioworxx; hiking: Peathegee Inc, Getty Images; rock climbing: Don Mason, Getty Images; swimming: Stuart O'Sullivan, Getty Images; skiing: Don Mason, Getty Images; picnicking: Glow Images, Inc, Getty Images; white-water rafting: Justin Bailie, Getty Images; American alligator: William Mahnken, Dreamstime; gray wolf: Shutterstock, Holly Kuchera; moose: Shutterstock, Arnold John Labre; happy face spider: Photo Resource Hawaii, Alamy Stock Photo; black bear: Jeanninebryan, Dreamstime; bighorn sheep: ironman100, Getty Images; lemonade: margouillatphotos, Getty Images; sparking water: Pavlo_K, Getty Images; hot chocolate: iStock, mphillips007; sweet tea: EPKIN, Getty Images; orange juice: ton2829, Getty Images; fruit punch: dem10, Getty Images