Carlsbad Caverns, New Mexico
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Located in the Guadalupe Mountains in New Mexico, United States, the Carlsbad Cavern is located inside of the Carlsbad Caverns National Park. The caverns have become the main attraction of the park and feature a large chamber known as the “Big Room” which is 4,000 feet long, 625 feet wide, and 255 feet high.
In regards to cave chamber, this is the fifth largest in North America and the 28th-largest in the entire world. Today, the caverns are accessible to the public where visitors can hike on their own on the established routes, or take guided tours for further information.