Treasures are scattered in the area. After finding them, you have to quickly return them to your hideout before the time runs out or before you get damaged. If ever you fail to do so, the treasure will return to its original location and you have to keep trying until you safely deliver it to the hideout. It will help clearing out the enemies along the way to make your job a lot easier.
#1. 101 Ways to cook scorpion
Found in the island south of the hideout. You have to use the archer costume to reach it.
#2. Golden Magic Lamp
This is found on ground level northeast of the palace.
#3. Bright Cane Polish
Requires: Thief Costume
On top of the tower that can be accessible only via pole with a snake basket underneath.
#4. Miss Decibel Painting
Requires: Thief and Archer costumes
Found in an offshore ancient door, you'll have to create a rope bridge using the archer costume then use the thief costume to disable the time door.
#5. Puffin's Cookie Jar
Found on the statue relief on the wall of the middle-eastern structure.
#6. Le Paradox Portrait
Located at ground level, behind the arcway and stairs northeast of the western plaza
#7. Marble Horse Head
Requires: Jailbird and Sabertooth costumes
Found in the northernmost chamber, behind the HQ.
#8. Jewel Encrusted Silver Scimitar
On top of the crate, west of the carpet shop
#9. Gold Cobra
Jewel Encrusted Silver Scimitar
On the northern tower in the eastern plaza. North of the library as well.
#10. Thief Treasure Chest
Jailbird and Samurai costumes required
Head to the middle-south portion of the map and scale the wall to reach the back of the library. Climb the rope and proceed to find a hallway with a laser floor trap.
#11. Jewelled Pillow
This is found inside the building to the west where you need to use Slow Time to sneak in. This is during the job where you have to spy on Ms. Decibel and Le Paradox.
#12. Arabian Carpet
in the northern area of the map, near the grated walls, you'll find an opening with some dummies. Use the Sabertooth costume to reach the door containing the treasure.