Glacier National Park is Montana's crown jewel. The expansive million-acre park, which was named after the remains of glaciers estimated to be 7,000 years old, offers captivating mountainous scenery left and right. Here, you'll find more than 700 lakes, six National Historic Landmarks (including Lake McDonald Lodge, Granite Park Chalet and the Two Medicine Store) and the famous Highline Trail, which follows the Continental Divide. Save time for a scenic drive along the Going-to-the-Sun Road, or better yet, join a Red Bus Tour to soak up the sights. Have you ever been to Glacier National Park?

Tanzania's Serengeti National Park is the world-renowned home of The Great Migration. Every year, roughly 2 million wildebeests and hundreds of thousands of zebras and gazelles cross the park in search of food and breeding grounds. Predicting when this momentous event will occur can be tricky, so if you don't have that kind of flexibility, a traditional safari experience is your best bet. You'll have the chance to see Serengeti's incredible landscape, as well as animals like the Big Five – leopards, lions, elephants, buffaloes and rhinoceroses. Would you like to visit Serengeti National Park?

As the largest national park in the Canadian Rockies, Jasper offers no shortage of outdoor fun. Come to this Alberta, Canada, national park to enjoy an array of adventure activities in summer, including hiking, biking and boating, plus snowshoeing, cross-country skiing and ice climbing in winter. A spring visit will give you a front-row look at rushing waterfalls and offers prime wildlife viewing opportunities, while a fall trip lends itself well to camping. No matter when you visit, be sure you take some time to stargaze. Jasper is the second-largest dark sky preserve in the world. Have you ever been to Jasper National Park?

South Africa's iconic Kruger National Park is one of the most tourist-friendly game parks on the continent. Kruger, which features paved roads for increased accessibility, is home to hundreds of animal species, including the Big Five and birds like eagles, storks and vultures. What's more, the national park boasts a variety of excursions and luxury lodges, as well as camping spots and specialty packages for honeymooners and families, meaning travelers with various budgets will be able to find something that suits their needs. If you had the opportunity to visit Kruger National Park, would you?

Swiss National Park in eastern Switzerland encompasses approximately 42,000 acres of verdant land, giving visitors access to roughly 60 miles of trails that weave in and out of valleys backed by the breathtaking Swiss Alps. While hiking, keep an eye out for wildlife ranging from well-known animals like foxes and eagles to Alpine ibexes (wild goats with large horns that live in the mountains). Keep in mind, this park closes from mid-November until the end of May with some higher trails remaining under snow through June, so time your trip for the warmer months. Have you ever been to Swiss National Park?