- Home and Garden
- Health and Fitness
- Fashion
- News and Politics
- Hobbies and Crafts
- Celebrity and Entertainment
- Tech and Gaming
- Cars, Motorcycles, Boats, and Aviation
- Family and Parenting
- Sports
- Travel and Outdoors
- Photography
- Art and Architecture
- See all magazines collections
Narrow passages, twisting upward or dropping precipitously. Huge vaults filled with fantastic shapes. Tunnels twined in tangled mazes. Over centuries, underground rivers can carve holes and rooms in solid rock; drips of water build walls of stone. Natural caves shape another world beneath our feet. Dangerous and beautiful, these places remain unknown—until someone decides to investigate.
In 2004, businessman and caver John Ackerman drilled an entryway into Goliath Cave, a huge and unexplored complex in the karst region of southeastern Minnesota. Squeezing through tiny openings, scuba diving through silt-filled waters, scaling walls, and traversing crevasses, he and his fellow cavers painstakingly mapped ever-further reaches of the complex in an exploration that continues to this day.
But man-made caves that do not breathe can be even more dangerous than their natural cousins. In St. Paul, also in 2004, five teenagers entered an area where intermittent fires robbed the air of oxygen. Only two emerged alive.
-
Creators
-
Publisher
-
Release date
March 20, 2009 -
Formats
-
Kindle Book
-
OverDrive Read
- ISBN: 9780873518307
-
EPUB ebook
- ISBN: 9780873518307
- File size: 4654 KB
-
-
Languages
- English
Formats
- Kindle Book
- OverDrive Read
- EPUB ebook
subjects
Languages
- English
Why is availability limited?
×Availability can change throughout the month based on the library's budget. You can still place a hold on the title, and your hold will be automatically filled as soon as the title is available again.
The Kindle Book format for this title is not supported on:
×Read-along ebook
×The OverDrive Read format of this ebook has professional narration that plays while you read in your browser. Learn more here.