The surface is damp with shallow rivers in places. (evo.co.uk)
We rode through shallow rivers to a red quartz canyon they call the «Throat of the Devil.» (theexpeditioner.com)
However, you'll have to complete a quick jungle hike and three shallow river crossings before you gain entrance to the mouth of the incredible cave system known as Actun Tunichil Muknal. (grandbaymen.com)