Boracay has 2 famous caves which they call Cave 1 and 2 located in the northern part of the island. If you'll go on island hopping, it'll be one of the destinations.
It's worth your while visiting these caves. Think of the grottos or caves in Capri or Sardenia in its Emerald Coast, it's comparable.
With crystal clear water and fabulous underwater attraction, you'll have fun exploring these caves or grottos.
This cave opens into the ocean. Unfortunately, when we went there that day it was really windy, and the waves were a bit rough, so were advised not to swim out, for our own safety