Below all coordinates to find all features:
Big cave: X:331.8, Y:458.1
Boat color cycle: X:641.5, Y:408.2 (travel here by boat; also does it on the ocean bottom)
Dead body cave: X:630.2, Y:685.0
Easy "Fearless Or Stupid" achievement or trophy dive: X:752.7, Y:656.1
Flying Fish: X:756.3, Y:634.3 (travel here by boat)
Goldilocks and the Three Bears reference: X:796, Y:647 (three chests with bear claw marks)
"Hi To The Internet" achievement or trophy: X:620 Y:557 (interact with buried head; it resembles the front box artwork)
Inside the rocks: X:721.2, Y:747.0 (travel here by jet ski from town and ride into the crevice at this location)
Invisible Water: X:588.8, Y:781.1 (walk near the nearby cliff and you will be suddenly underwater)
Moray eels: X:814.7, Y:612.0 (search near the bottom; they will wrap around you)
Ocean dry patch: X:302.8, Y:285.6 (travel here by boat, fall to the ocean bottom and walk around; try pushing the boat)
Outside flashlight: X:706.5, Y:643.5
Rock slides: X:702.2, Y:783.4 and X:465.6, Y:665.8 (jump in the rock crevices at these locations and slide upwards)
Table goat: X:360.4, Y:740.7
Treasure hole: X:346.9, Y:700.5
Underwater toilet and sick soldier: X:807, Y:637
Vultures: X:377, Y:793
Walk through wall in "Mother Lode" mission: X:684.3, Y:731.3 (enter mineshaft and jump across to the piece of wood on the right wall; walk through the wall here)
Waterfall glitch: X:678.1, Y:635.7 (behind the waterfall, jump through the back wall; Cargo Dump mission location)
X-ray glitch: X:761.7, Y:752.1 (in the Badtown store, jump on the counter and on the lantern and jump across to the shelf; stand up and look around for a weird view)
