All three Moon Sisters memory locations in Genshin Impact Frost Moon (Luna VIII)

Scattered across the Frost Moon in Genshin Impact are three hidden spots that replay the old memories of the Moon Sisters. Each one is gated behind a small puzzle or a movement mechanic, and finishing all three hands you a stack of chests along with the Immaculate Eternity and Threefold Transience achievement.

Quick answer: Trigger the memory boat at Golden Hall (after beating the Frostnight Scion), at Bubble Pool (via the Floating Ooze and Moonglow Frostfin Whale), and inside the sealed tower at Nuur Stone Circle (after maxing its offering system). Riding all three ships unlocks the achievement.

Before you start: Frost Moon access and systems you need

The Frost Moon opens up as part of the Moon Gazing world quest chain in the Luna VIII update. You need to reach Adventure Rank 20 and finish Archon Quest Prologue: Act III, “Song of the Dragon and Freedom,” before the area becomes reachable. Progressing Moon Gazing gradually unlocks the surface and its waypoints.

Two of the three memories also lean on progression systems tied to the region. The final location requires the Nuur Stone Circle offering system, which becomes available after you complete the Origin of the Sequence world quest. Make sure that quest is done before you attempt the third spot.

Moon Sisters memory #1: Golden Hall

Travel to Golden Hall, which sits southwest of the Archaeolune Storm Research Center. This is a combat gate, so come prepared to fight.

Defeat the Frostnight Scion that guards the area. The memory cannot be summoned until this enemy is cleared.

With the fight over, interact with the glowing, aura-like point beneath the floating rock. A boat appears once you do.

Sit on the boat to start the cutscene and watch back the first Moon Sisters memory. When it ends, you return to Golden Hall and receive one Luxurious Chest and two Exquisite Chests.

Moon Sisters memory #2: Bubble Pool

Head to Bubble Pool and walk up to the boat floating in the water. Approaching it triggers a set of prompts and starts an objective called The Unidentified Vessel.

Enter the Floating Ooze and wait as it carries you upward. You are climbing toward the ship, so let it lift you to a decent altitude before moving on.

Once high enough, climb onto the back of the Moonglow Frostfin Whale, which raises you even higher. From there, board the ship and sit on it to play the second memory. Finishing the cutscene awards a Precious Chest.

Moon Sisters memory #3: Nuur Stone Circle tower

Max out the Nuur Stone Circle offering system. Doing this lifts the seal on the giant tower nearby, which is the key that lets you reach the last memory.

Enter the now-unsealed tower and take the lift down to the lower level.

Interact with the glowing spot near the teleport waypoint to call the ship, then ride it to trigger the final Moon Sisters memory.

Rewards and how to confirm the achievement

Each memory pays out on its own, and clearing the full set is what pops the achievement. Riding the ship at all three sites is the trigger, so once the third cutscene at Nuur Stone Circle finishes, the Immaculate Eternity and Threefold Transience achievement unlocks.

Location	Requirement	Reward
Golden Hall	Defeat the Frostnight Scion, summon and ride the boat	1 Luxurious Chest, 2 Exquisite Chests
Bubble Pool	Rise via Floating Ooze, then the Moonglow Frostfin Whale, board the ship	1 Precious Chest
Nuur Stone Circle tower	Max the offering system, enter the unsealed tower, call and ride the ship	Immaculate Eternity and Threefold Transience achievement

Note: If a memory will not trigger, the usual cause is an incomplete prerequisite. Golden Hall stays locked until the Frostnight Scion is dead, and the tower at Nuur Stone Circle only opens after its offering system is fully leveled, which itself needs Origin of the Sequence completed first. Clear those and each ship becomes interactable.

Handle these in the order your progression allows rather than strictly by number. Golden Hall and Bubble Pool can be done as soon as you can reach them, while the tower memory tends to come last because it waits on the Nuur Stone Circle offering system. Once all three ships have carried you through their memories, the achievement and the accompanying chests are yours.