Oslob is not just about Whale Sharks. It is home to other interesting attraction. From the whale watching area you can see Sumilon island which is very popular for its white sand beach. You will encounter some folks offering boat tours to the island. There is also the ruins in town which we didn't visit. Interestingly, they also have waterfalls, a beautiful waterfalls they named Tumalog. I highly suggest you go there.
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When in Oslob, I highly recommend you pay Tumalog Falls a visit. It is one of my favorite waterfalls to date. It's not just about the physical beauty of the falls but also on the magical feel it brings. Wonder-fall!