Isla Cruces level: Gold Idol location: 
     When  you  get  to the waterfall where enemies attack you, defeat
them  all.  Then,  walk  into the waterfall. Behind the waterfall is a
secret room with the gold idol.

Unlockable Swords:
     The  following  swords  are listed by order of strength. Complete
the indicated task to unlock the sword.

Cutlass                 Default sword
Dutchman sword          Complete the Pearl Vs Dutchman level.
Norrington sword        Complete the Isla Cruces level.
Bone sword              Complete the Davy Jones' Locker level.
Gun sword               Complete the Sea Battle level.
Pirate King's sword     Complete the Shipwreck City level.
Davy Jones' sword       Complete the Maelstrom level.
Ghost sword             Complete the Hit Combo sub-mission 
                        on the Isla Cruces level.
Legend sword            Complete the Hit Combo sub-mission 
                        on the Maelstrom level.