National Geographic Travelのインスタグラム(natgeotravel) - 2月22日 22時24分

With over 400 miles of passageways (and counting!), the appropriately named Mammoth Cave is the longest cave system in the world. We took a behind the scenes tour of the cave system with Ranger Jackie (pictured here). Caves can be dark scary places, but Ranger Jackie has been guiding and exploring this system for over 18 years and you'd be hard pressed to find a better guide or advocate of this natural phenomenon. He was also a great sport, posing for pictures from time to time when I asked. We were blown away by Mammoth Cave...such a unique and special place .
Mammoth Cave National Park (6 of 59)
Shot with FUJIFILM X-T1 and XF16mm F1.4 lens

Photo by @jonathan_irish // Photographer and former Nat Geo staffer Jonathan Irish (@jonathan_irish) is on an epic road trip to visit and create incredible content in all of the 59 U.S. National Parks in 52 weeks during the centennial of the National Park Service. He'll be sharing his images and stories along the way here, on his own Instagram feed, and on the following link at Nat Geo: www.natgeo.com/59in52

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