Aztroboi
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This was my favourite experience visiting PR. For reference, I also did the bioluminescence tour in La Parguera, a walk around Old San Juan, drove up and down mountains and traveled through and around the island (except for the Southeast area) and slid down a natural waterslide at Gozalandia Falls.
With Tanama Adventures, we got to experience hiking on moderate to difficult terrain going up and down some slippery rocks at times. Crossed the river more than once mostly at chest height (I'm 5'7") with optional swimming in some deep areas. There is an option to cliff dive that's at least 25ft (I'm guessing). Suffice to say, you will be wet 100%. Life jackets were provided.
The hike on the hill was approx 25min one way and again, the terrain was varied--rocky, dirt and wet with obstacles--but there is a path. Again for reference, my group had a fun girl team in their 60/70s and although some considered it very tough to hike, they pushed through and enjoyed it. There really is risk of slipping and falling for sure...We kind of all did at some point so good tread on your closed toe sandals or water shoes are non-negotiable--you will probably slip still, just FYI. There was also natural spring water that I tried and damn...it was like Fiji water but x10. You don't have to believe me but believe me.
The caves we saw had an awe-inspiring feeling. The Cuevas del Arco was amazing to see in person. It's vast (see pic for scale vs size of the people). We also saw many bats high above us and Guava (?) spiders that a few from my group volunteered to touch😬. The other cave we visited was called Cuevas Obscura (I think) but it's nick name is "the dark cave". The guides (Jama & BJ) provided headlamps for us. We even turned off all lights inside the cave and there was a solemn feeling in there being pitch black in a cave full of bats!
What else am I missing...parking is ample. Easy to find. Best bang for your buck. No pressure of first come first serve like in El Yunque. The roads are windy and up and down but if you like that, you'll love it. If you have a small dry bag for your water bottle that would be very useful. A dry bag for your phone is a plus. I researched this hike beforehand and thought I could do it on my own but now that I've experienced it, I'm glad I went with a tour; to find the right route, for safety and to navigate the paths to the right places in and out of the caves were crucial. I watched a YouTube video of a dude who did it and I didn't think we'd be able to go where he went but we did them all and more. The tours are only in the morning because the river there is very dangerous to be in in the afternoon so if you do go on your own, be warned. Do your research!
To top it all off, BJ and Jama made sure our safety was top of mind yet, were also very knowledgeable and were very good energyâš¡. Thank you so much. You guys were amazing, to say the least. The things we did was jam packed inside 3ish hours. This was a unique experience that I don't think I could find in the mainland without a lot of yellow tape. This had Indiana Jones vibes for real. I was sincerely happy to have tried this. You also make friends and share pics:). If you have some hesitation to try this out, that's exactly the feeling you should have and go!
My pics don't do it justice but I hope it helps for scale and reference.