Carlsbad Caverns National Park in New Mexico, USA
Carlsbad Caverns is one of the most famous national parks in the United States. There are more than 20 rooms in the Carlsbad Cavern. However, not all of them are available for public visits. The reason is that not all of them are safe and are not easily accessible. Overall, there are two ways for the self-guiding tour. Each of them leads to different rooms and shows various aspects of the beauty inside. One of them is the Big Room, and the other is the Natural Entrance.
