![](http://www.alamy.com/thumbs/6/ED2F6ABF-508E-41EC-8316-E61F24AF259A/2X69D5X.jpg)
Underground river walk
Size: 7140px × 4760px
Location:
Photo credit: © Marco Faggi / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: adventure, calcifications, cave, departement, doubs, dripstone, explore, france, franche-comte, karst, lime, nature, research, river, scientist, settlements, sight, sinter, speleo, speleology, underground, walk