BRASS SPYGLASS
This treasure is located behind the big tent in the circus area, which is west of your hideout.
ROLLING PIN
This treasure is on top of the dunking booth in the circus area. To get on top of it, you will need to climb the tower slightly to the northeast. When you get to the platform with the barrel of arrows, you can Paraglide to the booth.
GOLDEN ARROW
You will need the Sabretooth and Thief Costumes for this treasure. Go to the northwest corner of the map. Leap to the lone castle tower with the Sabretooth Costume, then jump on the switch and activate the Slow Time ability of the Thief Costume. Use the nearby catapult to get to the door easily with the treasure.
MEDIEVAL METAL MAN
You will need the Samurai Costume for this treasure. Go to the northeast corner of the area you start when you exit the hideout. There is an ancestor door here and you need to deflect the fireball back at it with the costume mentioned above. The treasure is behind the door.
ARCHER'S HANDBOOK
You will need Archer and Sabretooth Costumes for this treasure. In the eastern half of the map, go to the Black Knight's castle's bridge. There is a barrel of arrows on the west side that lead to a platform with a dummy for the Sabretooth Costume. The treasure is behind the ancestor door.
COIN PURSE
You need the Archer Costume for this treasure. This one is located on the opposite side from the previous treasure. All you have to do is fire on rope arrow to a platform that has the treasure on it.
JEWELED SHOE
You need the Jailbird Costume for this treasure. Find the ship located just outside of the entrance to the Black Knight's castle. There's a platform right next to it that has an ancestor door that needs to be opened with the ball and chain of the costume mentioned. The treasure is behind the door.
BELL TOWER
Go back to where the previous treasure was located and look up on the balconies to the east of it. The treasure is on the second balcony.
SILVER MUG
Find the tower in the southeast corner of the map. From the base, go north and when you can, go west. Go past the catapult and you should see an opening that is an area underneath a building, which is where the treasure is located.
MAGIC POTION
You need the Archer Costume for this treasure. Go to the southeast corner of the map and get on the ship there. On the east end of the ship is a barrel of arrows, so use that to get to the platform in the distance. The treasure is behind the door.
STAINED GLASS COMPASS
You need Galleth for this treasure. This treasure is on top of the tower in the northeast corner of the map. Only Sir Galleth is able to ascend this tower.
GOLDEN ANVIL
This treasure requires Sir Galleth. Locate the giant clock in the middle of the eastern area. Directly south of this is a tower that only Sir Galleth can ascend. The treasure is on the top of this tower.