Tarzan tour is only available at certain tides,

Tarzan is a tour for adventurists who are eager to explore.  Tarzan tour includes tunnels that go into marine lakes, like Lost Lake and Tarzan Lake.  Snorkeling sites include Fish Bowl Reef, Belochel Bay and free diving into the Blue Room, a limestone cave reflecting Palau’s blue water, and a grand finale at Soft Coral Arch, and The Natural Arch.

Minimum 4 pax – Possible on Jan 3-7/ 19-22