Los Tres Ojos are 3 lagoons inside 3 caves, and then there's a fourth eye, an "open lagoon", that's not considered an "eye". All of them are fed by a subterranean river. The taíno people, the islands first habitants, used these caves for religious ceremonies.
At the beginning all 3 caves were one but an earthquake made them in the shape they are today. The lakes are fed by an underwater river called Brujuela. All caves have stalagmites and stalactites, some even joined together.
Lake 1 = Lago de azufre (sulphur lake): it has beautiful bluish water which doesn't really contain sulphur but calcium carbonate. There are fish in this lake, some imported from Venezuela that you'll see closest to the sunlight and some national fish who like the dark parts of the cave.
Lake 2 = La Nevera (the fridge): it's called like that because the sunlight never comes in. It has clear water. From this lake you take a boat to the fourth lake (or eye) called Zaramaguyones lake (Los Zaramaguyones) and back to the second lake so that you can continue on to the third one. On one of the stones on the fourth lake you can see a petroglyph made by Taíno indians, sort of in the shape of a happy face.
Lake 3 = Las Damas (ladies' lake): in this lake the Taíno women would bathe with their children while the men would bathe in the first and second lakes.
And we have lake 4, also known as Zaramaguyones lake.
The boat trip costs 10 pesos for adults and 5 pesos for children if you don't take a guide, if you do then the trip is included in his fee. We can recommend the guide Nicolás, who charges 300 pesos or 10US. The admissions fee is 50 pesos for adults, 20 pesos for children and 30 pesos for students with a student ID.
Address: Av. Las Américas.
Tel. nr: 809 472 4204.
Access: About 1.5km from Faro a Colón (Columbus Lighthouse) - walkable if you're armed with comfy shoes and you don't feel like paying for a taxi. If you do take a taxi, negotiate a fare before getting in.