Carlsbad Caverns National Park

"The Natural Entrance Trail is a steep 1¼-mile (2 km) descent, equivalent to about 79 stories, from the cave entrance to the Big Room. This approximate one-hour tour is recommended only for those in good physical condition."

Holy crap! I need an "I survived the Carlsbad Natural Entrance Trail" sticker! We got there right before they opened, which was awesome, because we had the caverns almost to ourselves. When we were leaving, the place was packed!Read more