Bring up your map and look around 'the heart of the jungle.' In the Bendy trail zone, there is a tree which needs a bridge built. Go to it and look for a yellow !. Click on it and you will be given instructions on how. Without that bridge, you can't finish that area.

Or checking Show All zones on the map

There is 2 zones you need to climb tree to change zone :)

isn't there a hidden zone in Skull Island? The "Big Whoop" or something?

Why did you go to Skull Island?
You said you were trying to get 2 pieces for the Heart of the Jungle.'
EXACTLY what Quest are you working on?

Bush Glow is a game option. Click the little gear shaped icon near your Map and set it if it's not already set.

If you are looking for one of the 'Pages' or one of the 'Ruins' then use the Maps 'Show Active Quest' feature. I.E. Turn that on (it's on your Map). Then hover your mouse over the name of whatever quest you are talking about. Then see that 8 squares in the Jungle have changed color. Then go to each one of those squares and look CAREFULLY for whatever it is that you are looking for. What you are looking for is in one of those and you have missed it.

If you are not looking for the Pages or Ruins then your post is so uninformative that we can't actually help you with whatever it is that you are looking for. Hence the reason someone pointed you all the way on the other side of the game into a completely different zone from the Jungle.

now that i understand how to do the bush glow option i see where i need to go but back to the frustration level again i was at because they are locked and im unsure at how to unlocek them

i cant open the one below the bridge i can only cross the bridge and the one above the zone after u cross the bridge

One thing to check, are you up to date on ALL the Kings Quests? If you aren't you will have trouble completing this area. And there is one square that leads to the Heart of the Jungle that has 2 exits. You may want to go into all the surrounding squares and check for that if you are still having trouble.

Didn't I say that you get into that square from above it? Well I implied it by saying you have to go west from TBC, then you go south into that last square.
You are worried about it WAY before you are even able to get there.

Have to say this, it's surprising that you didn't obsess about all 16 of the Jungle squares the minute that you started the Jungle and ALL of them were locked.

'will just keep looking' ? Didn't you read what I just said in my last post about exactly where that gate to that square is?

OK so if you need a picture, here is a section from a part of my spreadsheet.
| and - are direct connections, ~ is a circuitous connection.
But first I'll say in words one more thing, EVERY gate in this game, even areas you have yet to get to ONLY connect square to square from the Left, or Right, or Top or Bottom. There are some in the Caves that appear to be Diagonal but they are not. And the 2 Bridges themselves are still actually ONLY Left and Right Over a square that that in and of itself STILL can only be reached from Top or Bottom (actually neither from the Bottom).

P.S. In the following 'Map' I abbreviate every square like my whole Map. I also have some of the areas after the Jungle just to taunt you.
[PRE]

~TSI~ - TJC TRC TCL - TDM - TLR
| | |
TSJ - TMS TSL - THC - TSP
| | |
TCR ~~[ TJL ]~~ TBT THOTJ - TFOTM
| |
TGH - TDR TTJ - TBC - TAF
| | |
TJPR - TAH ~~[ TFC ]~~ TIW - TTR

[/PRE]