The Tanama River has adventure written all over it, and it’s not for the faint of heart.

A local company founded and operated by young spelunkers will take you on a journey like no other, as you rappel down to the river and then “bodyraft” in icy waters for several hours of unadulterated underground fun. Then you will come upon the Ventana (Window) Cave, which opens the way to enjoy the beauty of some of the most striking valleys in Puerto Rico.

Another possible venture through the Tanama River incorporates a view of the Arecibo radar/radio telescope, the largest of its kind in the world, which you will see from a trail in a nearby mountain.

If you’re really wild at heart, you will wish to spend the night along the river’s banks. The entire group of fellow travelers has to set up camp, make a bonfire and cook their own food. Late in the evening, the sky affords a stunning view of stars and stars and still so many more stars.

This tour will also grant you the sublime experience of jumping from 25 feet high into nature’s own version of a pool. More rappelling awaits you in a dramatic descent of 110 feet.

How to Get There

From San Juan Take Road 26 towards Carolina until you reach Road 3, take Road 3 towards Fajardo for about 20 minutes until you get to Rio Grande. Then take Road 191 to El Yunque.