America’s Great Outdoors Tumblr updates

12/05/2016 10:20 AM EST

Carlsbad Caverns National Park in New Mexico is a wonderful place to explore the world below. The unique caverns were formed over 4 million years ago by sulfuric acid dissolving limestone – creating long tunnels and amazing rock formations. Take a self guided tour of the Big Room or embrace adventure and follow a ranger into the deep, dark, tight recesses of this fascinating park. Photo courtesy of Aaron Bates.

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