Boo Windows (Batu Bolong)
Boo Windows is a small rock island distinguished by two large, water-level arches that completely pierce the structure. Underwater, these formations create two swim-throughs at a depth of 3-5 meters, giving the site its name—batu bolong translates to "hollow rock." A typical dive plan begins on the eastern side of the rock, descending a steep wall covered in yellow and orange soft corals. As divers drift with the current, they are led toward the "windows," which are often filled with dense schools of silversides and yellowtail fusiliers. The reef composition includes large table corals, leather corals, and massive gorgonian sea fans. It is a prime location for spotting green sea turtles and the occasional wobbegong shark (Eucrossorhinus dasypogon) resting on ledges.









