Carlsbad Caverns National Park in New Mexico sent cavers to bottom of a “Bottomless Pit” to look for trash thrown in by tourists. They found $14.36 in change.
Bottomless Lakes State Park, New Mexico
Here's what was at bottom of New Mexico's 'Bottomless Pit
Bottomless Lakes State Park - Wikipedia
The Legends At Bottomless Lakes State Park May Terrify You
The Legends At Bottomless Lakes State Park May Terrify You
Investigating New Mexico's Bottomless Lakes
Bottomless Lakes State Park - Wikipedia
Here's what was at bottom of New Mexico's 'Bottomless Pit
Bottomless Lakes State Park – Roswell, New Mexico - Atlas Obscura
Getting to the bottom of Mel's Hole, News
Pecos Slope Groundwater