Entrance to Sintersee underground lake, Tropfsteinhöhlen Cave, Austria.
Son Doong Cave, Vietnam
(private rp) Rose led Kid to a beautiful cave which looked like stars were growing from the roof.
CAVES, TUNNELS, PATHS & ETC
Ruby Falls in Chattanooga, underground cave waterfall - (CC)Peter Merholz (peterme) - www.flickr.com/photos/peterme/525284366/in/photostream/
Feeling Blue... & Teal... & Aquamarine...
Shaft of light - underground - caves
Jenolan Caves Karst Conservation Reserve - Part of the Greater Blue Mountains Unesco Site.
Bermuda Crystal Caves - The Stripe
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The Kokopelli's Cave B&B in New Mexico is an underground cave hotel built into the vertical cliff of Tertiary Ojo, 70-feet below the surface of the earth.
Dan I did some snorkeling in an underground cave similar to this one -loved it!
Slovenian Caves - the Grand Canyon of the underground.
Travel Bucket List