| http://www.w3.org/ns/prov#value | - During the 2-hour drift back downstream you will enter caves and see underground waterfalls and on the river, see stalagmites and stalactites.If you are especially fit, try hiking up to a farther cave (you will be climbing inside some caves for this adventure) which will take approximately 1.5 hours with the drift back downstream lasting about 2 hrs. or more.This type of tour may be offered by sever
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