Photo: Khairil Azhar Junos

From the largest canyon in the world to the tallest living tree, here are 12 American parks with amazing wonders.

Source: These national parks are home to some of the most incredible U.S. landmarks

Mammoth Cave National Park, a UNESCO World Heritage Site and International Biosphere Reserve located in south central Kentucky, recently made headlines for adding 6 miles to the world’s largest cave system, which is now at 426 explored miles.

Source: Road Trips & Recipes: Hidden surprises in Horse Cave, Kentucky

Photo: ColorPlayer

Explore Mammoth Cave National Park with Katherine Gallagher’s list of 10 mind-blowing facts, including its unique karst topography, springs, caves, and rich history.

Source: Mammoth Cave National Park: The Longest Cave in the World and Much More

Photo: Mark C Stevens

In the early 1840s, believing the air was therapeutic, Kentucky doctor John Croghan ran a consumption sanatorium deep underground…

Source: When Tuberculosis Patients Quarantined Inside Kentucky’s Mammoth Cave

This Kentucky national park is known for having the world’s longest known cave system. From hiking to tours and more, here’s how to plan a trip.

Source: Guide to Visiting Mammoth Cave National Park


Weeks before Michael Schroeder actually headed to Mammoth Cave National Park for a weekend trip, and a day after he’d booked several guided cave tours, he encircled his chest with a tape measure.

Source: Travel: Kentucky’s underground rock star: Mammoth Cave National Park

In the 1830s and ’40s, the pioneering spelunker mapped out many of the underground system’s most popular spots…

Source: Enslaved Tour Guide Stephen Bishop Made Mammoth Cave the Must-See Destination It Is Today

You could fly to Florida for a cold-weather getaway, or you could go underground.

Source: Weary of Winter Already? It’s Always Cozy in Mammoth Cave. – Cincinnati Magazine