Underground caves, anyone?
474806
Name the date, time & place, and I'll be there - Sexy B!
1030508
Try www.Cavenders.com...\n\nHope you fine what you are looking for...
57571
You might like Crystal Cave in Sequoia National Park.\nhttp://www.sequoiahistory.org/cave/cave.htm\n\nAt present it is closed for the winter but when the snow melts in about May it will be open.
1166349
Haha I didn't know they had internet connections in those caves, Mr Bin Laden.\nI hope you are hiding...because Bush is gonna get you REALLY soon. Better hide and shut up!
28860
You're asking about divining.\n\nWhen divining is tested using anything even remotely resembling a scientific test, it fails.  You can't find underwater pipes (tile in your question) or any other form of underground water that way.\n\nYou might resubmit your question to a group that covers perpetual motion, ghosts, or alien abductions.  You might get an explanation from them.
1138413
There is a place called Cave-in Rock Illinois where ILL and Kentucky meet the Ohio river runs in the middle. Very small town lots of privacy! Hint Hint!! Not far from southern Indiana.
929430
subterranean homesick blues
957744
Golems\n\nThere are others
639637
Top secret.\n\nMy guess is the subway tunnels somewhere!
406328
Okay listen carefully,\n\nOil is not found in caves for Heaven's sake! Oil is found inside porous permeable rocks. That means that tiny holes are interconnected together like a network of capillaries. When you pump out the oil there is no real big void left to cave in. Besides water is sometimes found w/ the oil. Since oil is less dense it rides over the top of the water. So if anything fills the spaces left behind it will be water!\n\nNow the ground will cave in where they pump massive amounts of groundwater out of aquifers found in limestone bedrock.\n\nLimestone dissolves due to natural acids such as carbonic acid. Voids or caverns or caves, whichever you prefer to call them are created & fill w/ water. When the water is pumped out, there is nothing left to support the structures above. The ground caves in & poof you have a sinkhole.\n\nSinkholes have been known to swallow whole blocks in cities. Florida is entirely underlain w/ limestone bedrock. The whole state has sinkholes everywhere.\n\nSo don't be concerned about pumping oil out & leaving gaping holes behind. Those you don't have to worry about. You do have to worry about pumping too much groundwater.\n\nTurn off the water while you are brushing your teeth next time.
314727
cavepeople banging sticks and rocks together?
1055542
Yes they do. I have known several who have been diving in Prince William Sound and Resurrection Bay.\nI don't have personal proof but would guess that there are a number of suitable locations in South East AK. \nP.S.Bring a Dry Suit\nCheck with \nhttp://www.divealaska.net/
599865
when I was in high school my friend and I use to hang out in a cave that few people knew about.  One day we gathered up all the candles we could find and took them to the cave.  We also brought our guitars.  The cave was all lit up and we were surrounded by massive rock columns. There was also a stream that ran through the cave with water so pure and blue, revealing albino fish, tiny creatures once hidden.  Suddenly, this place felt sacred, like a church cathedral.  We ran around the columns and throughout the cave and later played our guitars, making up crazy songs. The acoustics were awesome.  I could have stayed in that moment forever.
143830
Be no a fool.Those folks get way too serious.If you must,you would need to be invisible.I have studied,I can think of no way in.Even if you could tunnel,they would get you.At best you could peek over a hill and see the lights.Forget it.
756648
When I went to Moosejaw a few years ago and did a tour of the underground tunnels, I was shocked to find out about the Chinese Immigrants and how they were treated. We never learned about this in school. They would work in the laundries and the working and living environments they were put under were horrific. You can probably find more info if you google it.
985719
Have you tried looking under a rock?
218750
This is probably not something you will ever find. Most cave locations are now kept confidential by both government agencies and organized cavers. Private landowners also frequently keep this information confidential in order to avoid lawsuits from trespassers. This practice is for the protection of the caves. Many caves have delicate environments with unique and endangered species and in order to protect these most organized cavers no longer release cave locations. \n\nThe best map I can refer you to is a recent GIS project that was aimed at determining geographic distribution of caves in the lower 48 states:\nhttp://www.caves.org/pub/journal/PDF/V61/v61n3-Culver.pdf\n\nIf you have a valid scientific purpose for this information you may get help from the Tennessee Cave Survey, which is affiliated with the National Speleological Society:\nTCS:\nhttp://www.webwhisper.com/tcs/default.html\nNSS:\nhttp://www.caves.org/