Скачать или смотреть Inside the Carlsbad Caverns

The Carlsbad Caverns are a sprawling underground site with over a hundred caves. A century ago this year, it was named a national monument. Seven years later, it became a national park. As the decades have gone on, more and more people have visited the site to see the underground wonders we know about - and explore the ones we don't yet. Jeff Glor reports.

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"CBS Saturday Morning" co-hosts Jeff Glor, Michelle Miller and Dana Jacobson deliver two hours of original reporting and breaking news, as well as profiles of leading figures in culture and the arts. Watch "CBS Saturday Morning" at 7 a.m. ET on CBS and 8 a.m. ET on the CBS News app.

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