"This karst landscape in the state of New Mexico comprises over 80 recognized caves. They are outstanding not only for their size but also for the profusion, diversity and beauty of their mineral formations. Lechuguilla Cave stands out from the others, providing an underground laboratory where geological and biological processes can be studied in a pristine setting."
Source: UNESCO World Heritage
Postcard 1
Carlsbad Caverns is one of the world's largest underground chambers. Carlsbad Caverns National Park is located in New Mexico. Thanks to Jocelyn of New Mexico for sending this card.
Postcard 2
Rock of Ages in Carlsbad Caverns. Thanks to Elena of South Carolina, USA. Mailed in May 2019.
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