Findings:

• Nick Cave
• cave
• Mammoth Cave
• Cave Dwellers
• Cave Canem
• Cave Diving
• Red Rose Cave and Pothole Club
• The Caves of Steel
• Jenolan Caves
• Clan of the Cave Bear
• Yorkshire Caves
• show caves
• Allegory of the Cave
• The Cave
• Surah 18 The Cave
• Enter Your Cave
• prehistoric cave art
• The Caves of Altamira
• glacier cave
• The Cave of Time
• Nick Cave's Love Song Lecture
• Nick Cave and the Bad Seeds
• The Cave of Kai
• Jinmium Cave deposits
• Elephanta Caves
• Nick Cave's Letter to MTV
• Nick Cave's Letter to Gap
• Chinese cave people
• The Crystal Cave
• Nottingham's caves
• Shoshone Ice Caves
• Jim Is Now A Blind Cave Salamander
• Cave in
• Blombos Cave
• Mother Shipton's Cave
• Cave of the Winds
• Crystal Caves
• Aillwee Caves
• Eurasian cave lion
• The Lost Cave of Oh-Bay-Yo-Yo
• Oregon Caves
• Wind Cave National Park
• Oregon Caves National Monument
• What the scroll in the cave told me
• Mammoth Cave National Park
• Cave formation
• Cave Quake 3 Arena
• Several Species of Small Furry Animals Gathered Together in a Cave and Grooving with a Pict
• A love of caves
• Cave flyer
• Cave Clan
• Crag Cave
• Bear Cave
• Lower Crag Cave
• cave diver
• Empire Cave
• caves (user)
• Grendel's Cave
• Tabon Caves of Palawan
• Mexican Blind Cave Tetra
• The Cold Cave
• Cave of Machpela
• Petralona Caves
• snow cave
• Bhimbetka Caves
• Bat Cave, North Carolina
• Hospital Cave
• Fingal's Cave
• Cave of Kelpius
• Through Chasm Caves & Titan Woods
• Edward Cave
• Hohle Fels Cave
• For cold caves know; The moon's seeing the mad and dead
• Lost in the cave
• cave (user)
• Karst cave
• Cave Story
• Idols of the Cave
• Sun Baked Snow Cave
• Tumbling Rock Cave
• Cave of Hands
• Cave of Forgotten Dreams
• A Partial Summary of Nine Prehistoric Caves of France
• Song of Ceber 28: Ceber in the Cave
• The Caves of Androzani
• man cave
• cave tr33 (user)
• Colossal Cave Adventure
• The Truth Is a Cave in the Black Mountains
• Cave Johnson
• Dragon Cave
• Charles River
• Eagle River
• Savannah River
• River Plate
• Congo River
• Rivers Cuomo
• A River Runs Through It
• Missouri River
• Mississippi River
• River
• Lehigh River
• East River
• Cuyahoga River
• Green River
• River Raid
• Joan Rivers
• Barren River Lake
• Yellowstone River
• Hudson River
• river otter
• Wabash River
• Ohio River
• Euphrates
• Tigris
• Dnieper
• Sam Rivers
• Irrawaddy River
• The Bridge on the River Kwai
• Jordan River
• Vltava River
• Scheldt
• Columbia River
• River Phoenix
• Slow River
• Three Rivers Stadium
• Red River Rebellion
• Illumination riddle: River
• Bob Rivers
• River of Blue Fire
• Bug River
• Indian River
• Grand River
• Passaic River
• river blindness
• From Pent-up Aching Rivers
• To the River
• Yellow River
• The Swanee River
• Black Dragon River
• Moon River
• Sava River
• head of the river
• River City Ransom
• River Euphrates
• River Falls, Wisconsin
• They moved like a river
• River Stour
• The river is ceaseless
• River Usk
• The River Merchant's Wife
• Find the River
• Ichetucknee River
• river, in all his innocent beauty and home in hers
• Language is like a river
• New River Valley
• Blood River Down
• Caddo River
• Ompompanoosuc River
• Snake River Conspiracy
• River Severn
• East River Pipe
• Everything is like a river
• River City Rebels
• Don River
• River Humber
• Yukon River
• Erewhon : Chapter III - Up the River
• Erewhon : Chapter V - The River and the Range
• Ol' Man River
• Santa Ana River
• Los Angeles River

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