A great natural phenomenon, a cave/cavern where the sun shines through to make a beautiful coloured "eye". Somewhat more developed than I was expecting €3 entry fee and a bit of a queue. Interesting museum about the coastline and sea life, and a viewing platform. We saw a turtle! Some were jumping from the edge into the bay.

We were at the “blue eye” about 12.30 in December - after waiting and “pulling” in a queue, you can see just a “slice” of blue in a big black hole. It could be cool to see when the sun would be higher in other seasons, but even for that, there are other places in the world, where you don’t need to wait in a relatively long queue and been on a “flow line” of moving towards and take a few pictures and then leave it. The scenery was not bad, but again, other Atlantic or Mediterranean islands offer more.

Another stop on every tour of the island. In an 18 m deep cave, the water shines a light blue when the sun is at the right position. To see this, you sometimes have to wait in line for a long time and pay an entrance fee of three euros. If the weather permits, you can swim in a nearby natural pool. There are also beautiful views of the wild coast. There is a visitor center with a souvenir shop, café and toilets.