The second largest cave chamber in the world (more than 1 km long and over 100 meters high) is located in the Carlsbad Caverns National Park in New Mexico, USA, a UNESCO World Heritage site.
- …The second largest cave chamber in the world (more than 1 km long and over 100 meters high) is located in the Carlsbad Caverns National Park in New Mexico, USA, a UNESCO World Heritage site.