I had a hard time pronouncing
Pinacanauan River that when I told a friend about it I just described it to her
as "Like a scene out of a Stephen
King novel where the bats flew out of the cave, millions of them covering the
dusk sky with darkness".
There are many massive cave systems in the town of Penablanca in Cagayan Valley. The most popular of these is Callao Cave. Another cave one ought to visit is the Sierra Cave, a cave almost similar to the caves of Sagada where one would twitch and turn his/her body to enter small openings. This is in contrast with the vastness of Callao Cave which has a huge underground dwelling with an entrance as wide as the gates of Gothic palaces. After a brief rest in Tuguegarao we proceeded to Penablanca by taking a 45 minute tricycle ride. Callao cave is located near the scenic Pinacanauan River where we witnessed the circadian flight of over a million bats.