Uncharted games have always featured hidden treasure to find, and Sony Bend says Golden Abyss is full of secrets.
It's prepared to help you find them all too; if you're not the sort to enjoy such things as exploration you can purchase treasure maps which will lead you straight to the artifacts.
The maps are incorporated into Drake's journal for ease of access - which is handy since the Vita is unable to run its web browser with a game running in the background, preventing the use of online FAQs which will offer the same info.
You can buy them without having quit the game though, via a purchase button to the UNCHARTED: Golden Abyss Live Area page which links directly to the PlayStation Store. Have a peek at the maps through the link below.