The Rio Camuy Caves are on the opposite side of the main island, if you're staying in Le Consulat or downtown San Juan. It takes about an hour to get there, but this is a great place to visit, also you get to see the Arecibo Observatory which is about 20 minutes from here. You can cover these two great places in 1 day. Camuy Caves is the biggest cave system, I've ever been to. If you like caves, don't miss this place! Million year old stalactites and stalagmites are just the tip of the iceberg to this magnificent cave system.