Cueva de las Golondrinas is located on the sprawling Atlantic coast of Río San Juan, just a five-minute boat ride from town. It is an optional stop that is included in the visits to the Gri Gri Lagoon, and the captain will be able to enter the small cavern with the boat, be careful with your head! You will be able to observe the beautiful rock formations from floor to ceiling while floating in crystal clear turquoise waters. Once outside the cave, you can swim in the waters of the calm natural pool that surrounds it.