Credit goes to Falwen from GameFAQs for the list

Treasure Hunts

Format
Name \\ Level of Locator needed \\ Reward
Where to pick up the tip
Where to find the treasure

#1 Tosca Treasure Hunt \\ Level 1 \\ Dark Crystal Staff & Ring
Mountain Village Tosca \\ Automatically obtained after receiving locator
Mountain Village Tosca \\ Top of the tower near the entrance

#2 The Bird's Shiny Treasure \\ Level 1 \\ Level 4 Spirit Magic spell "Virus"
Mountain Village Tosca - Tolty's Inn \\ Talk to Innkeeper Tolty
Old Sorceress' Mansion \\ Left side of map before entering the mansion

#3 The Black Cave's Mysterious Treasure \\ Level 1 \\ Curse Blocker accessory
Numara - Deeno Family House \\ Talk to Deeno
Black Cave - Hall of Foul Creatures \\ Passage directly branching off the exit from Hellpit

#4 Talio's Returned Favor \\ Level 1 \\ Level 5 Spirit Magic spell "Splitter"
City of Saman - Main Street \\ Must have helped the man prove he didn't steal the money and then talk to him after (after Experimental Staff)
Port of Saman \\ End of the dock

#5 King of the Glaciers \\ Level 1 \\ Water Charm accessory
City of Saman - Emelio's Tavern \\ Talk to Zamilo (after Experimental Staff)
Ice Canyon - Ice Gourge \\ After making it past the geysers near the entrance of Blizzard Peak slide down the cliff and zone back into Ice Gorge

#6 A Refugee's Misplaced Item \\ Level 1 \\ Scroll of Balance accessory
Gohtza - Low Town - Abandoned Apartment (after Gohtza freezes) \\ Talk to man behind elevator on Floor 10
Gohtza - Low Town \\ Southwest corner

#7 An Item at the Hot Spring \\ Level 1 \\ Spire Commander & Ring
Gohtzan Refugee Camp - Medical Tent \\ Talk to old man on the bed after defeating Don Laploss
Gohtzan Refugee Camp \\ Next to the hot spring

#8 Hidden Treasure in Station Square \\ Level 1 \\ Gaia Breaker & Ring
Uhra - Monorail - Central Square \\ Talk to Raha on disc four
Uhra - The Central Station Square \\ Near the monument

#9 Sewer Junk \\ Level 1 \\ Scroll of Secret Skills accessory
Uhra - Main Street \\ Talk to Muhga on disc four
Uhra - Back Alley - Sewers \\ Near the entrance behind the inn

#10 Trash Can Treasure \\ Level 1 \\ 4 Byproduct X
Uhra - Virno's Tavern \\ Talk to Virno on disc four
Uhra - Main Street \\ Behind the inn

#11 King Gongora's Secret \\ Level 1 \\ Demon King's Ring & Horn
Great Gate of Uhra \\ Talk to the first guard on disc four
Uhra - Gongora's Mansion - Magic Experimentation Labratory \\ Near Gongora's diray

#12 Cave Treasure \\ Level 1 \\ 12 Master Thief Tools
Gohtza City - Elevated Entrance \\ Talk to Jeeg on disc four
Terrace Cave \\ Near the center of the cave


#13 Art Piece From the Ruin \\ Level 2 \\ Lucent Dragon Discus & Ring
City of Saman - Audun's Item Shop \\ Talk to Valle (after Experimental Staff)
Great Ancient Ruins - Throne of Sun \\ Return to where you fought the Ancient Fiend

#14 Lost at the Fountain Square \\ Level 2 \\ Level 7 Spirit Magic spell "Refreshus"
City of Numara - Thelran's Inn \\ Talk to Rakki on disc four
City of Numara - White Square \\ Near the fountain

#15 Treasure in the Destroyed City \\ Level 2 \\ Level 7 Spirit Magic spell "Reversa"
City of Numara - Sanuman Family House \\ Talk to Numan
Ghost Town - City of Ruins \\ Where the Arthrosaurus used to stand

#16 Missing Materials \\ Level 2 \\ 3 Star Absorber
White Boa - Guest Area \\ Talk to Crewman after obtaining the White Boa
White Boa - Main Deck \\ North side

#17 What the Cursed Mask Guards \\ Level 2 \\ Phoenix Discus & Ring
City of Numara - Katyla Family House \\ Talk to Tatan on disc four
Temple of Enlightenment - Altar of Truth \\ Search where Sorceror Fu stood

#18 Hidden in the Cave \\ Level 2 \\ Angel Guard accessory
Forgotten Cave \\ Automatically obtained after walking into the cave a bit
Forgotten Cave \\ East side of cave

#19 Sunken Town \\ Level 3 \\ Solomon Staff & Ring
White Boa - Engine Area \\ Talk to nearby Crewman
World Map \\ Break through the Northern ice barrier and disembark the Nautilus underwater

#20 Sunken in the Sea of Baus \\ Level 3 \\ Apocalypse Rod & Ring
Uhra - Virno's Tavern \\ Talk to Virno after receiving dream "A Hero's Return" and on disc four
World Map \\ Submerge the Nautilus East of the Sea of Baus

#21 Treasure Beyond the Waterfall \\ Level 1 \\ Medusa's Head accessory
Mountain Village Tosca \\ Obtained after viewing dream "The Hero"
Mountain Village Tosca \\ Behind the waterfall

#22 Lirum's Treasure \\ Level 1 \\ Level 3 Spirit Magic spell "Ailment Void"
Mountain Village Tosca - Tolty's Inn \\ Obtained after viewing dream "So Long, Friend"
Northern Cape \\ Just North of where the paths meet

#23 The General's Memento \\ Level 2 \\ Ogre Bangle accessory
Gohtzan Refugee Camp - Medical Tent \\ Obtained after viewing dream "Signpost"
Crimson Forest - Near Swamp \\ Near the elevator down to the Sorceror's Shrine

#24 Sarah's Gift \\ Level 2 \\ Blazing Fire Amulet accessory
Uhra - Main Street \\ Obtained after viewing dream "Beyond the Wall"
Old Sorceress' Mansion - Courtyard \\ Right side of stairs leading to Hermitage