Genshin Impact: All Echoing Conch locations for Barbara’s swimsuit (Act II)

Broken Isle: Tidewatch Sentries and High-Tide Warning

As soon as you spawn at the fast travel point, look to the west and jump down.

The “Tidewatch Sentries” Echoing Conch is on a small ledge just before you hit the bottom.

As for “High-Tide Warning,” you’ll need to glide to the small island north of your position.

It’s on the very top of the rock formation near a challenge marker.