Findings:

• Mammoth tank
• Mammoth Cave
• Wooly Mammoth's appetite
• Mammoth
• Woolly Mammoth
• Ode on the Mammoth Cheese Weighing Over 7,000 Pounds
• Mammoth Mountain
• mammoth moth
• Mammoth Records
• Mammoth Cave National Park
• Mammoth, California
• The Mammoth Song
• Mammoth Spring
• Colorado Mammoth
• Pygmy Mammoth
• Mammoth (user)
• Pitfall II: The Lost Caverns
• Caverns of Zeux
• Carlsbad Caverns National Park
• Cavern
• Caverned
• Howe Caverns
• Secret Caverns
• Florida Caverns State Park
• Luray Caverns
• Kartchner Caverns State Park
• The Cavern Under the Sea
• Blue John
• Stump Hole Cavern
• Cumberland Caverns
• Wailing Caverns

If you Log in you could create a " mammoth caverns" node. If you don't already have an account, you can register here.